Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to London from £186

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — LON
4 Jun — 11 Jun1
1 adult
Tue 4/6
Tue 11/6

The best prices from Seattle/Tacoma Intl to London are usually found in November or January, booked 7 days in advance, depart on a Thursday or Sunday and return on a Wednesday

Cheap flight deals from Seattle to London

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 May 2024.

Popular in

June

Cheapest in

November

Average price

£711

Round-trip from

£68
High demand for flights, 29% potential price rise
Search Deals
Best time to find cheap flights, 19% potential price drop
Search Deals
Average for round-trip flights in May 2024
Search Deals
From Seattle/Tacoma Intl to London (LON)
Search Deals

What is the cheapest day to fly round-trip from Seattle to London?

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to London. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from Seattle to London?

Travelers have found it’s best to book a flight 8 days in advance to save up to 51% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 8 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to London 1-2 weeks in advance for as low as £524, or £864 for flights within the next 24 hours.

What is the cheapest month to fly from Seattle to London?

The best pricing can be found in the month of November. Prices to London from Seattle average £676. You can even find prices in November for less than £676, as users have found deals to London from as low as £440. The month of June appears to be one of the more expensive times to travel to London from Seattle. Flying in the targeted month can save you up to 40%.

What is the cheapest time of day to fly from SEA to LON?

One of the essential ways to save on airfare from Seattle to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 28% on airfare.

Cheap British Airways flights from Seattle to London

Explore cheap flight options specifically provided by British Airways for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Find some of the cheapest British Airways flights travelling from Seattle to London. Come back soon if you're not finding the exact deal you're looking for.
Wed 2/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 29/5£471
Sun 29/913:40SEA - LHR
Nonstop9h 20mBritish Airways
Thu 17/1009:45LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£472
Fri 27/913:30SEA - LHR
Nonstop9h 20mBritish Airways
Fri 18/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 28/5£510
Thu 3/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Tue 15/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£511
Sun 25/819:40SEA - LHR
Nonstop9h 20mBritish Airways
Tue 17/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£539
Sun 29/913:40SEA - LHR
Nonstop9h 20mBritish Airways
Sat 19/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£540
Fri 25/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Sat 2/1114:50LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 29/5£550
Fri 4/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Mon 14/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£550
Sun 1/919:40SEA - LHR
Nonstop9h 20mBritish Airways
Mon 30/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 29/5£569

  • If you’re travelling from Seattle to London, one of the more common airlines travelling that route is British Airways. Flights from British Airways travelling this route typically cost £886.96 RT. This price is typically 53% cheaper than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found was £674. When travelling from Seattle to London on British Airways, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is London Heathrow Airport. When flying from Seattle to London, British Airways flights are 5% more popular than any other airline flying that same route.

Cheap KLM flights from Seattle to London

Explore cheap flight options specifically provided by KLM for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Have a look at some of the cheapest available KLM flights departing from Seattle and landing in London. Check back soon if you're not seeing flights that suit your needs.
Mon 23/921:15SEA - LHR
Nonstop9h 35mKLM
Tue 22/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 29/5£485
Tue 24/921:15SEA - LHR
Nonstop9h 35mKLM
Wed 9/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 30/5£486
Thu 19/921:15SEA - LHR
Nonstop9h 35mKLM
Tue 17/1216:35LHR - SEA
Nonstop10h 25mKLM
Deal found 29/5£524
Thu 19/921:15SEA - LHR
Nonstop9h 35mKLM
Thu 26/916:50LHR - SEA
Nonstop10h 30mKLM
Deal found 30/5£525
Tue 10/921:15SEA - LHR
Nonstop9h 35mKLM
Thu 19/916:50LHR - SEA
Nonstop10h 30mKLM
Deal found 30/5£559
Thu 26/921:15SEA - LHR
Nonstop9h 35mKLM
Sun 13/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 29/5£564
Fri 7/613:30SEA - LCY
1 stop12h 00mKLM
Wed 12/610:00LCY - SEA
1 stop14h 35mKLM
Deal found 30/5£1,567
Tue 4/613:30SEA - LCY
1 stop12h 00mKLM
Fri 19/710:00LCY - SEA
1 stop14h 35mKLM
Deal found 29/5£2,029
Tue 4/613:30SEA - LCY
1 stop12h 00mKLM
Sat 20/710:00LCY - SEA
1 stop14h 35mKLM
Deal found 29/5£2,068

  • One of the most popular airlines travelling from Seattle to London is KLM. Flights on this route from KLM typically cost £905.02 RT, a price that is 54% cheaper than the average Seattle to London flight. The cheapest flight found was £638 RT. The most popular departure airport in Seattle when flying to London is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, KLM flights are 4% more popular than any other airline flying that same route.

Cheap Seattle to London flights in May & June 2024

Find cheap flight options from Seattle to London specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 908,271 searches. Prices were last updated on 30 May 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Tue 11/607:40SEA - LGW
2 stops31h 20mMultiple Airlines
Tue 18/621:45LGW - SEA
3 stops31h 40mMultiple Airlines
Deal found 30/5£605
Mon 24/623:00SEA - LHR
1 stop13h 20mIcelandair
Fri 30/813:05LHR - SEA
1 stop15h 30mIcelandair
Deal found 30/5£609
Mon 17/623:00SEA - LHR
1 stop13h 20mIcelandair
Wed 11/913:05LHR - SEA
1 stop12h 50mIcelandair
Deal found 30/5£616
Mon 17/618:55SEA - LGW
2 stops18h 05mMultiple Airlines
Mon 24/617:05LGW - SEA
2 stops26h 15mMultiple Airlines
Deal found 30/5£668
Mon 17/618:55SEA - LTN
2 stops19h 20mMultiple Airlines
Mon 24/615:05LTN - SEA
2 stops28h 15mMultiple Airlines
Deal found 30/5£680
Tue 18/623:38SEA - LHR
1 stop13h 07mJetBlue
Tue 10/908:25LHR - SEA
1 stop20h 41mJetBlue
Deal found 30/5£680
Tue 11/613:10SEA - LGW
3 stops25h 50mMultiple Airlines
Tue 18/621:45LGW - SEA
3 stops31h 40mMultiple Airlines
Deal found 30/5£686
Sat 15/623:00SEA - LGW
2 stops25h 05mMultiple Airlines
Fri 21/610:00LGW - SEA
2 stops18h 35mMultiple Airlines
Deal found 30/5£690
Tue 18/623:38SEA - LHR
1 stop13h 07mJetBlue
Wed 11/911:55LHR - SEA
1 stop18h 54mJetBlue
Deal found 30/5£692

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Tue 15/1018:45SEA - LTN
1 stop13h 40mMultiple Airlines
Tue 22/1010:00LTN - SEA
1 stop15h 01mMultiple Airlines
Deal found 30/5£399
Mon 7/1018:45SEA - STN
1 stop11h 35mMultiple Airlines
Fri 18/1007:10STN - SEA
1 stop17h 51mMultiple Airlines
Deal found 29/5£414
Tue 15/1015:10SEA - LHR
1 stop14h 10mLufthansa
Tue 29/1007:40LHR - SEA
1 stop13h 40mLufthansa
Deal found 30/5£435
Tue 22/1015:10SEA - LHR
1 stop14h 10mLufthansa
Mon 4/1120:15LHR - SEA
1 stop25h 05mLufthansa
Deal found 30/5£441
Tue 8/1010:40SEA - LHR
1 stop18h 40mLufthansa
Tue 15/1014:10LHR - SEA
1 stop30h 20mLufthansa
Deal found 30/5£446
Mon 4/1114:35SEA - LGW
1 stop12h 20mMultiple Airlines
Tue 19/1112:00LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 29/5£450
Sat 12/1018:45SEA - STN
1 stop11h 30mMultiple Airlines
Thu 17/1007:45STN - SEA
1 stop17h 16mMultiple Airlines
Deal found 29/5£452
Tue 15/1010:40SEA - LHR
1 stop18h 40mLufthansa
Tue 22/1014:10LHR - SEA
1 stop30h 20mLufthansa
Deal found 30/5£454
Tue 15/1011:15SEA - LGW
1 stop14h 45mVirgin Atlantic
Tue 22/1012:00LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 30/5£455

Direct flights to London from Seattle

Discover direct flight options from Seattle to London. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Consider booking one of these non-stop flights heading from Seattle to London. Those looking to potentially save on 1 or 2-stop flights from Seattle to London should utilise the search form at the top of the page.
Tue 1/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Thu 24/1009:45LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 28/5£471
Sun 29/913:40SEA - LHR
Nonstop9h 20mBritish Airways
Tue 15/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£472
Tue 24/921:15SEA - LHR
Nonstop9h 35mKLM
Wed 9/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 29/5£485
Tue 24/921:15SEA - LHR
Nonstop9h 35mKLM
Wed 9/1016:50LHR - SEA
Nonstop10h 25mKLM
Deal found 30/5£486
Fri 27/913:30SEA - LHR
Nonstop9h 20mBritish Airways
Thu 24/1009:45LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 28/5£510
Thu 3/1013:30SEA - LHR
Nonstop9h 20mBritish Airways
Tue 15/1009:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 30/5£511
Thu 19/921:15SEA - LHR
Nonstop9h 35mKLM
Tue 17/1216:35LHR - SEA
Nonstop10h 25mKLM
Deal found 29/5£524
Thu 19/921:15SEA - LHR
Nonstop9h 35mKLM
Thu 26/916:50LHR - SEA
Nonstop10h 30mKLM
Deal found 30/5£525
Sun 25/813:40SEA - LHR
Nonstop9h 20mBritish Airways
Tue 10/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 29/5£531

Seattle to London flights leaving soon

Find last-minute flight options from Seattle to London for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Consider one of these great deals we found on last-minute flights from Seattle to London. Users should be sure to double check the price, date, and time of their last-minute flight.
Tue 4/607:00SEA - LHR
2 stops30h 35mMultiple Airlines
Tue 11/607:05LHR - SEA
2 stops21h 30mMultiple Airlines
Deal found 30/5£735
Tue 4/607:00SEA - LGW
2 stops27h 20mMultiple Airlines
Wed 12/620:15LGW - SEA
1 stop24h 55mMultiple Airlines
Deal found 30/5£745
Tue 4/607:00SEA - LGW
2 stops28h 40mMultiple Airlines
Wed 19/606:00LGW - SEA
1 stop22h 35mMultiple Airlines
Deal found 30/5£751
Tue 4/611:40SEA - LGW
2 stops20h 40mMultiple Airlines
Wed 19/610:45LGW - SEA
2 stops29h 47mMultiple Airlines
Deal found 30/5£755
Tue 4/607:00SEA - LGW
2 stops27h 20mMultiple Airlines
Wed 17/710:45LGW - SEA
1 stop37h 30mMultiple Airlines
Deal found 29/5£765
Tue 4/607:00SEA - STN
2 stops24h 35mMultiple Airlines
Tue 27/811:40STN - SEA
1 stop16h 55mMultiple Airlines
Deal found 30/5£768
Tue 4/607:00SEA - LTN
2 stops25h 25mMultiple Airlines
Wed 19/606:15LTN - SEA
1 stop13h 05mMultiple Airlines
Deal found 30/5£770
Tue 4/611:40SEA - LGW
2 stops20h 40mMultiple Airlines
Mon 17/610:45LGW - SEA
2 stops30h 14mMultiple Airlines
Deal found 30/5£771
Tue 4/613:10SEA - LGW
3 stops20h 50mMultiple Airlines
Mon 17/610:45LGW - SEA
2 stops30h 14mMultiple Airlines
Deal found 30/5£778

One-way flights to London from Seattle

Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
Take a look at some of the best available options we've come across on one-way flights from Seattle to London. For those needing a return trip from Seattle, there is a search form available above.
Wed 20/1114:35SEA - LHR
1 stop12h 20mIcelandair
Deal found 29/5£186
Sun 6/1015:50SEA - LHR
1 stop20h 30mIcelandair
Deal found 30/5£195
Tue 8/1015:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 29/5£197
Sun 29/918:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 29/5£198
Wed 25/918:55SEA - LHR
1 stop33h 00mIcelandair
Deal found 30/5£200
Tue 3/918:45SEA - LHR
3 stops19h 25mMultiple Airlines
Deal found 30/5£201
Mon 30/915:50SEA - LHR
1 stop12h 05mIcelandair
Deal found 30/5£204
Sun 29/907:00SEA - STN
2 stops26h 15mMultiple Airlines
Deal found 29/5£205
Sun 29/907:00SEA - LTN
2 stops24h 30mMultiple Airlines
Deal found 29/5£205

Find flights from Seattle to London within your budget

Customise your flight search to find flights from Seattle to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£399 - £485

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Luton

SEA - LTN

SEALTN

Seattle/Tacoma Intl

Tue 15/10

1 stop13h 40m

London Luton

Tue 22/10

1 stop15h 01m

£399

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 15/10

1 stop14h 10m

London Heathrow

Tue 29/10

1 stop13h 40m

£435

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 24/11

1 stop12h 20m

London Heathrow

Fri 29/11

1 stop12h 45m

£456

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/10

2 stops15h 20m

London Heathrow

Tue 8/10

2 stops17h 46m

£458

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 29/9

1 stop14h 40m

London Heathrow

Fri 18/10

1 stop15h 59m

£464

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 29/9

Nonstop9h 35m

London Heathrow

Tue 15/10

1 stop13h 05m

£466

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 2/10

Nonstop9h 20m

London Heathrow

Wed 9/10

Nonstop9h 45m

£471

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 6/10

Nonstop9h 20m

London Heathrow

Thu 17/10

1 stop16h 22m

£480

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 23/9

Nonstop9h 35m

London Heathrow

Tue 22/10

Nonstop10h 25m

£485

Flights are sorted by cheapest first

Deals found on 30/5

How far ahead should I book a flight from Seattle to London?

Use this chart to determine the optimal time to book a return flight from Seattle to London. Price data was last updated on 24 May 2024.
The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 7 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

What is the cheapest day to fly from Seattle to London?

Use this chart to determine the cheapest time to fly return from Seattle to London. Price data was last updated on 26 May 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their Seattle to London flight should consider departing on Wednesday at midday when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Seattle to London

Have a flexible travel schedule? Discover the best time to fly to London from Seattle with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in London by month

Plan your trip to London by taking into account the average temperature and rainfall totals by month.

LON

Temperature

4 - 17 °C

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 30 May 2024.
Read through reviews of airlines operating flights from Seattle to London, such as British Airways, KLM and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very Good
10,430 reviews
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,520 reviews
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
1,954 reviews
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,372 reviews
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.6
Good
720 reviews
Delta
8.0
Very Good
10,430 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to London?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London. You should not have trouble finding flights to London from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Seattle airport to London. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • Can I find flights from Seattle to London for under £400 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under £400. The cheapest flight booked recently is on Multiple Airlines for just £399, but on average you can expect to pay £452.

  • Are there nonstop flights from Seattle to London for under £500 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London under £500. A good price for a nonstop flight from Seattle to London is less than £524.

  • Are there last-minute flights available from Seattle to London for under £800?

    There are currently 20+ open flights from Seattle to London within the next 7 days for less than £800.

  • What are the cheapest airlines flying from Seattle to London round-trip?

    Cheapflights users have booked flights from Seattle to London round-trip from £435. Other airlines that can offer you cheap pricing are Icelandair, from £456, and Air Canada, from £458. Lufthansa is currently priced 35% below the average price you’ll pay for this route.

  • What are the most popular routes from Seattle to London?

    The most popular route from Seattle to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City.

  • What are the most reliable airlines from Seattle to London?

    No one likes to see their flight delayed. When booking a flight from Seattle to London consider choosing American Airlines (71%), Aer Lingus (71%) or Finnair (71%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to London?

    The cheapest flight price from Seattle to London is £366. On average you can expect to pay £643. The most popular route, (Seattle/Tacoma Intl - London Heathrow), can usually be booked for £447.

  • What does SEA to LHR mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to London Heathrow Airport flight would often be abbreviated as a SEA to LHR flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

  • Can I find deals for flights from Seattle to London that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to London that include hotel bookings?

    Yes. In addition to deals on Seattle to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to London.

  • Can I find deals for business class flights from Seattle to London?

    Yes. Cheapflights offers flight deals from Seattle to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to London that allow pets onboard?

    Many airlines flying from Seattle to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to London?

    Yes, you can often find last-minute deals on Seattle to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to London flight deals updated?

    The Seattle to London flight deals you see on this page were last updated on 30/5.

  • What are the most popular airlines that fly from Seattle to London?

    The most popular airlines flying from Seattle to London are Air France, Finnair and British Airways. Something to consider prior to booking your flight.

  • What is the cheapest month to book a flight from Seattle to London?

    Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of £110). Flying from Seattle to London in June is currently the most expensive (average of £162). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to London
See prices for flight routes from nearby airports that may be better suited for you.

Seattle to Heathrow flights
Seattle to Gatwick flights
Seattle to London City flights
Portland to Heathrow flights
Portland to Gatwick flights
Seattle to Edinburgh flights
Portland to Luton flights
Portland to Edinburgh flights
Portland to Stansted flights
Seattle to Manchester flights
Spokane to Heathrow flights
Spokane to Gatwick flights
Portland to Manchester flights
Seattle to Birmingham flights
Seattle to Bristol flights
Portland to Leeds flights
Seattle to Leeds flights
Seattle to Liverpool flights
Spokane to Edinburgh flights
Spokane to Manchester flights
Portland to Southend flights
Spokane to Southampton flights
Portland to Bristol flights
Bellingham to Gatwick flights
Seattle to Newcastle upon Tyne flights

Top 5 airlines flying from Seattle to London

Discover the top 5 airlines that operate flights from Seattle to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 908,271 searches. Data last updated 30 May 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£426Average£525FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£501Average£712FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£523Average£651FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£527Average£611FlexibilityNo cancel feeOn-time77%
Search Air France flights
FinnairCheapest£530Average£697FlexibilityNo cancel feeOn-time76%
Search Finnair flights
London Stansted Airport to Alicante flights
London to Netherlands flights
London to Bora Bora flights
London to Antigua flights
London to Split flights
Bournemouth to Scotland flights
Inverness to Amsterdam flights
Manchester to Murcia flights
Newcastle upon Tyne to Milan flights
Birmingham to Amsterdam flights
Newquay to Faro flights
Seattle to Liverpool flights

Search flights from Seattle to London by cabin class

Find flights from Seattle to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy class

Hourly flight availability from Seattle to London

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 May 2024.
0%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
65%of flight departuresAfternoonNoon to 6 pm
35%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM

Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 30 May 2024.
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights
Sunday20daily flights

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Erie
Flights to Reggio Calabria Tito Menniti
Flights to Salerno Costa d'Amalfi
Flights to Leh
Flights to Guilin
Flights to Dire Dawa Aba Tenna D Yilma
Flights to Houmt Souk Melita
Flights to La Paz El Alto Intl
Flights to Edremit/Korfez
Flights to Skardu
Flights to Asaba Intl
Flights to Elazig
Flights to Lhasa
Flights to Samarkand
Flights to Gazipasa
Flights to Jinhua Yiwu
Flights to Hefei Xinqiao Intl
Flights to Nouakchott
Flights to Kuantan
Flights to Antakya Hatay
Flights to Malatya Erhac
Flights to Makale
Flights to Ashgabat
Flights to Aswan

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to London?

Deals for Seattle to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to London?

Cheapflights simply makes it quick and affordable to book flights from Seattle to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to London with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to London flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines