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

Delta, at £515, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include Air France and Air Canada. Delta is priced at 15% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from London to Seattle one-way?

£425 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £426 and £428, respectively.

What are the most popular routes from London to Seattle?

When deciding which route to take from London to Seattle consider London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl as they are the most popular.

What are the cheapest flights from London to Seattle?

On average you can expect to pay £2,173 for a flight from London to Seattle. The cheapest flight overall is £464 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £401.

What are the most reliable airlines from London to Seattle?

Consider Air France (73%), Delta (73%) or Virgin Atlantic (73%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.

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

Before booking your flight from London to Seattle check out the most popular airlines for this route: Air Canada, Air France or Finnair.

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

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 17% on the overall cost on flights from London to Seattle.

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

Travelers have found it’s best to book a flight 44 days in advance to save up to 38% 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 44 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 London to Seattle 1-2 weeks in advance for as low as £599, or £847 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, January can be a great choice for travel to Seattle. Flights to Seattle from London in January are about £609 on average during January, but can be found for as low as £349.

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

Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 13 daily inbound flights from London from 12 different airlines.

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

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

How can I find direct flights from London to Seattle?

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

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

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

£421+ Flights from London to Seattle

The best prices from London to Seattle/Tacoma Intl are usually found in January or February, booked 65 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from London to Seattle

Round-trip from	£515
One-way from	£421
Popular in	August
Cheapest in	January
Average price	£658

Delta
10/1-28/2
Nonstop
19h 40m total
London to Seattle

Search Deals

22/2
2 total stops
20h 40m total
London to Seattle

Search Deals

High demand for flights, 15% potential price rise

Search Deals

Best time to find cheap flights, 3% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from London to Seattle

Cheapest flights from London to Seattle
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 December 2024.

Fri 27/1210:05LHR - SEA

1 stop19h 10mUnited Airlines

Wed 8/123:17SEA - LHR

1 stop13h 18mUnited Airlines

Deal found 20/12£526

Fri 27/1214:30LHR - SEA

2 stops27h 20mAir Canada

Thu 9/110:35SEA - LHR

1 stop15h 35mAir Canada

Deal found 20/12£534

Fri 27/1209:25LHR - SEA

Nonstop9h 55mBritish Airways

Thu 9/113:35SEA - LHR

1 stop13h 55mBritish Airways

Deal found 20/12£563

Mon 30/1213:15LHR - SEA

Nonstop10h 00mMultiple Airlines

Wed 19/217:45SEA - LHR

Nonstop9h 25mMultiple Airlines

Deal found 20/12£578

Mon 30/1216:00LHR - SEA

1 stop24h 55mDelta

Fri 14/300:40SEA - LHR

1 stop23h 25mDelta

Deal found 20/12£609

Tue 31/1213:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Fri 31/117:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 20/12£626

Tue 31/1213:10LHR - SEA

2 stops29h 45mAmerican Airlines

Fri 31/113:43SEA - LHR

2 stops32h 32mAmerican Airlines

Deal found 20/12£641

Mon 30/1213:15LHR - SEA

Nonstop10h 00mAir France

Sat 15/318:45SEA - LHR

Nonstop9h 25mAir France

Deal found 20/12£649

Wed 25/1212:15LHR - SEA

1 stop12h 45mIcelandair

Tue 7/114:35SEA - LHR

1 stop20h 55mIcelandair

Deal found 20/12£665

Sun 29/1211:20LGW - SEA

2 stops21h 37mMultiple Airlines

Sun 19/122:17SEA - LGW

2 stops25h 13mMultiple Airlines

Deal found 19/12£685

Mon 30/1206:00LHR - SEA

2 stops23h 15mSWISS

Wed 19/212:37SEA - LHR

2 stops25h 03mSWISS

Deal found 21/12£689

Tue 24/1206:30LHR - SEA

1 stop13h 22mKLM

Wed 8/119:04SEA - LHR

Nonstop9h 36mKLM

Deal found 20/12£753

Best flights from London to Seattle
Discover carefully curated flight deals from London to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 December 2024.

Fri 10/112:40LHR - SEA

Nonstop10h 00mDelta

Fri 28/219:30SEA - LHR

Nonstop9h 40mDelta

Deal found 20/12£515

Mon 20/115:15LHR - SEA

2 stops36h 41mMultiple Airlines

Fri 24/115:15SEA - LHR

1 stop13h 35mMultiple Airlines

Deal found 21/12£517

Wed 8/113:15LHR - SEA

Nonstop10h 00mAir France

Mon 13/117:45SEA - LHR

Nonstop9h 25mAir France

Deal found 21/12£518

Mon 14/409:30LHR - SEA

2 stops16h 58mAir Canada

Fri 16/512:20SEA - LHR

1 stop13h 15mAir Canada

Deal found 20/12£519

Tue 15/415:40LGW - SEA

1 stop13h 00mIcelandair

Mon 19/519:00SEA - LGW

1 stop11h 40mIcelandair

Deal found 20/12£519

Sun 13/417:50LCY - SEA

1 stop26h 35mLufthansa

Sun 18/514:20SEA - LCY

1 stop18h 05mLufthansa

Deal found 20/12£523

Mon 13/118:45LGW - SEA

2 stops36h 08mSWISS

Sun 26/112:50SEA - LGW

2 stops21h 00mSWISS

Deal found 21/12£523

Sun 13/414:25LHR - SEA

1 stop16h 59mIberia

Tue 20/513:30SEA - LHR

Nonstop9h 20mIberia

Deal found 20/12£523

Mon 24/211:00LHR - SEA

1 stop20h 06mFinnair

Thu 27/206:03SEA - LHR

1 stop21h 57mFinnair

Deal found 20/12£524

Sun 13/409:45LHR - SEA

Nonstop9h 45mBritish Airways

Sat 17/513:30SEA - LHR

Nonstop9h 25mBritish Airways

Deal found 20/12£529

Sat 18/108:40LCY - SEA

2 stops21h 45mVirgin Atlantic

Fri 24/106:00SEA - LCY

2 stops18h 10mVirgin Atlantic

Deal found 20/12£537

Thu 6/214:50LHR - SEA

2 stops27h 10mWestJet

Sat 8/211:30SEA - LHR

2 stops17h 20mWestJet

Deal found 20/12£543

Direct flights from London to Seattle
Explore direct flight options from London to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 December 2024.

Fri 10/112:40LHR - SEA

Nonstop10h 00mDelta

Fri 28/219:30SEA - LHR

Nonstop9h 40mDelta

Deal found 20/12£515

Wed 8/113:15LHR - SEA

Nonstop10h 00mAir France

Mon 13/117:45SEA - LHR

Nonstop9h 25mAir France

Deal found 21/12£518

Mon 3/215:00LHR - SEA

Nonstop9h 55mFinnair

Mon 17/218:50SEA - LHR

Nonstop9h 25mFinnair

Deal found 20/12£525

Sun 13/409:45LHR - SEA

Nonstop9h 45mBritish Airways

Sat 17/513:30SEA - LHR

Nonstop9h 25mBritish Airways

Deal found 20/12£529

Wed 8/113:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Wed 22/117:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 20/12£551

Thu 16/115:00LHR - SEA

Nonstop9h 55mAmerican Airlines

Thu 23/118:50SEA - LHR

Nonstop9h 25mAmerican Airlines

Deal found 19/12£569

Wed 1/115:00LHR - SEA

Nonstop9h 55mIberia

Wed 22/118:50SEA - LHR

Nonstop9h 25mIberia

Deal found 21/12£772

Tue 25/315:00LHR - SEA

Nonstop9h 55mMultiple Airlines

Wed 26/319:50SEA - LHR

Nonstop9h 25mMultiple Airlines

Deal found 20/12£855

Fri 3/115:50LHR - SEA

Nonstop10h 30mKLM

Fri 10/119:32SEA - LHR

Nonstop9h 38mKLM

Deal found 20/12£1,834

Last-minute flights from London to Seattle
Discover last-minute flight deals from London to Seattle. Data last updated 21 December 2024 and is based on user searches.

Fri 27/1210:05LHR - SEA

1 stop19h 10mUnited Airlines

Thu 9/111:05SEA - LHR

1 stop12h 50mUnited Airlines

Deal found 20/12£526

Fri 27/1214:30LHR - SEA

2 stops27h 20mAir Canada

Thu 9/110:35SEA - LHR

1 stop15h 35mAir Canada

Deal found 20/12£534

Fri 27/1209:25LHR - SEA

Nonstop9h 55mBritish Airways

Thu 9/113:35SEA - LHR

1 stop13h 55mBritish Airways

Deal found 20/12£563

Fri 27/1209:25LHR - SEA

Nonstop9h 55mFinnair

Fri 10/107:05SEA - LHR

1 stop15h 15mFinnair

Deal found 20/12£819

Fri 27/1210:05LHR - SEA

1 stop19h 10mUnited Airlines

Wed 8/123:17SEA - LHR

1 stop13h 18mUnited Airlines

Deal found 20/12£526

Sat 28/1209:25LHR - SEA

Nonstop9h 55mIberia

Tue 7/118:50SEA - LHR

Nonstop9h 25mIberia

Deal found 20/12£789

Sun 29/1211:20LGW - SEA

2 stops21h 37mMultiple Airlines

Sun 19/122:17SEA - LGW

2 stops25h 13mMultiple Airlines

Deal found 19/12£685

Mon 30/1213:15LHR - SEA

Nonstop10h 00mMultiple Airlines

Wed 19/217:45SEA - LHR

Nonstop9h 25mMultiple Airlines

Deal found 20/12£578

Mon 30/1216:00LHR - SEA

1 stop24h 55mDelta

Fri 14/300:40SEA - LHR

1 stop23h 25mDelta

Deal found 20/12£609

Mon 30/1213:15LHR - SEA

Nonstop10h 00mAir France

Sat 15/318:45SEA - LHR

Nonstop9h 25mAir France

Deal found 20/12£649

Mon 30/1206:00LHR - SEA

2 stops23h 15mSWISS

Wed 19/212:37SEA - LHR

2 stops25h 03mSWISS

Deal found 21/12£689

Tue 31/1213:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Fri 31/117:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 20/12£626

One-way flights from London to Seattle
Search for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated 21 December 2024.

Sat 22/211:45STN - SEA

2 stops20h 40mMultiple Airlines

Deal found 20/12£421

Thu 9/112:00LGW - SEA

1 stop20h 19mMultiple Airlines

Deal found 21/12£423

Wed 8/115:35LTN - SEA

2 stops51h 03mMultiple Airlines

Deal found 20/12£423

Mon 3/308:50LHR - SEA

2 stops21h 48mAer Lingus

Deal found 20/12£425

Fri 17/114:50LHR - SEA

1 stop31h 48mWestJet

Deal found 20/12£426

Fri 9/515:40LGW - SEA

1 stop13h 00mIcelandair

Deal found 21/12£428

Fri 24/120:40LHR - SEA

1 stop28h 20mIcelandair

Deal found 20/12£428

Wed 15/115:00LHR - SEA

Nonstop9h 55mBritish Airways

Deal found 20/12£433

Mon 13/108:20LHR - SEA

1 stop21h 01mIberia

Deal found 20/12£441

Wed 29/115:00LHR - SEA

Nonstop9h 55mFinnair

Deal found 20/12£442

Wed 8/120:40LHR - SEA

2 stops56h 54mMultiple Airlines

Deal found 20/12£443

Fri 9/506:45LCY - SEA

1 stop18h 20mAer Lingus

Deal found 20/12£448

Find flights from London to Seattle within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 10/1

12:40-14:40

Nonstop10h 00m

Seattle/Tacoma Intl

Fri 28/2

19:30-13:10

Nonstop9h 40m

£515

LondonSeattle

LCY - SEA

LCYSEA

London City

Sun 2/3

17:15-12:10

1 stop26h 55m

Seattle/Tacoma Intl

Sun 16/3

16:10-16:40

2 stops17h 30m

£516

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 20/1

15:15-19:56

2 stops36h 41m

Seattle/Tacoma Intl

Fri 24/1

15:15-12:50

1 stop13h 35m

£517

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 8/1

13:15-15:15

Nonstop10h 00m

Seattle/Tacoma Intl

Mon 13/1

17:45-11:10

Nonstop9h 25m

£518

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 14/4

09:30-18:28

2 stops16h 58m

Seattle/Tacoma Intl

Fri 16/5

12:20-09:35

1 stop13h 15m

£519

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 15/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Mon 19/5

19:00-14:40

1 stop11h 40m

£519

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 13/4

14:25-23:24

1 stop16h 59m

Seattle/Tacoma Intl

Tue 20/5

13:30-06:50

Nonstop9h 20m

£523

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 24/2

11:00-23:06

1 stop20h 06m

Seattle/Tacoma Intl

Thu 27/2

06:03-12:00

1 stop21h 57m

£524

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 15/1

18:45-22:53

2 stops36h 08m

Seattle/Tacoma Intl

Thu 30/1

15:25-17:50

2 stops18h 25m

£528

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 13/4

09:45-11:30

Nonstop9h 45m

Seattle/Tacoma Intl

Sat 17/5

13:30-06:55

Nonstop9h 25m

£529

Flights are sorted by cheapest return flights first.

Deals found on 20/12

Showing 1-10 of 60 results

...

Best time to book a flight from London to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from London 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.

Travel insights for flights from London to Seattle

Get recent, data-driven insights about flights from London to Seattle including ideal travel times, pricing trends, and more.

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

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from London to Seattle (average of £622). Flying from London to Seattle in July is currently the most expensive (average of £946). 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.

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 11% on flights from London to Seattle by exploring options for tickets in the evening.

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

Travellers seeking maximum savings on their London to Seattle flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Seattle

The most flights from LON to SEA are scheduled on a Friday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Seattle by month

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from London to Seattle, such as SWISS, American Airlines and Air France. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Emirates

8.1

Very Good

3,403 reviews

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

Delta

8.0

Very Good

8,597 reviews

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

Air New Zealand

8.0

Very Good

495 reviews

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

KLM

7.8

Good

1,344 reviews

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

Finnair

7.7

Good

1,282 reviews

Emirates

8.1

Very Good

3,403 reviews

Check prices

Reviews

1 / 10

Related info for your journey

What airport do you fly into for flights to Seattle from London?
Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 13 daily inbound flights from London from 12 different airlines.
What are the cheapest airlines flying from London to Seattle round-trip?
Delta, at £515, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include Air France and Air Canada. Delta is priced at 15% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from London to Seattle one-way?
£425 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £426 and £428, respectively.
What are the most popular routes from London to Seattle?
When deciding which route to take from London to Seattle consider London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl as they are the most popular.
What are the most reliable airlines from London to Seattle?
Consider Air France (73%), Delta (73%) or Virgin Atlantic (73%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.
What are the cheapest flights from London to Seattle?
On average you can expect to pay £2,173 for a flight from London to Seattle. The cheapest flight overall is £464 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £401.
Can I find deals for flights from London to Seattle that include hotel bookings?
Yes. In addition to deals on London to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Seattle.
Can I find deals for business class flights from London to Seattle?
Yes. Cheapflights offers flight deals from London to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Seattle?
Currently, January is the cheapest month in which you can book a flight from London to Seattle (average of £622). Flying from London to Seattle in July is currently the most expensive (average of £946). 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

Top 10 airlines flying from London to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£316	Average£659	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£392	Average£562	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Lufthansa	Cheapest£411	Average£579	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£424	Average£651	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest£440	Average£583	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Aer Lingus	Cheapest£442	Average£693	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£448	Average£592	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£470	Average£615	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	Cheapest£471	Average£661	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air France	Cheapest£482	Average£636	FlexibilityNo cancel fee	On-time77%	Search Air France flights

Fly with Cheapflights

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

Cheapflights makes it easy to find London to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from London to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London to Seattle from £421

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 22/2. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London to Seattle/Tacoma Intl are usually found in January or February, booked 65 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap flight deals from London to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Seattle

Cheapest flights from London to SeattleExplore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 December 2024.

Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 December 2024.

Find flights from London to Seattle within your budget

Best time to book a flight from London to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.

Travel insights for flights from London to Seattle

Get recent, data-driven insights about flights from London to Seattle including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from London to Seattle. Price data was last updated on 13 December 2024.

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

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

Find hourly flight availability from London to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 December 2024.

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

Use this chart to determine the cheapest time to fly return from London to Seattle. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Seattle

Explore weekly flight availability from London to Seattle. 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 21 December 2024.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from London to Seattle, such as SWISS, American Airlines and Air France. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Seattle. 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 into for flights to Seattle from London?

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

What are the cheapest airlines to fly from London to Seattle one-way?

What are the most popular routes from London to Seattle?

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What are the cheapest flights from London to Seattle?

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

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Fly from London to Seattle on these airlines

Choose from the following airlines for your flight from London to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 21 December 2024.

Top 10 airlines flying from London to Seattle

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Cheapest flights from London to Seattle
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 December 2024.