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Cheap flights from the United Kingdom to Seattle from £245

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
6 Apr — 13 Apr1
1 adult

Cheap flight deals from United Kingdom to Seattle

Keep the following information in mind while searching for United Kingdom to Seattle flight deals. Data was last updated 1 April 2025.

Round-trip from

£411

One-way from

£245

Popular in

August

Cheapest in

January

Average price

£543

Good round-trip deal

£556 or less

Good one-way deal

£649 or less
United Airlines
  • United Airlines
  • 27/4-4/5
  • 4 total stops
  • 63h 28m total
  • United Kingdom to Seattle
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26/5
  • 26/5
  • 2 total stops
  • 37h 28m total
  • United Kingdom to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£85 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from United Kingdom to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from United Kingdom to Seattle/Tacoma Intl.
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Find flight deals from United Kingdom to Seattle

Cheapest flights from United Kingdom to Seattle
Explore the most affordable flight options available from United Kingdom to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 April 2025.

Sun 27/412:30EDI - SEA
2 stops29h 17mUnited Airlines
Sun 4/514:14SEA - EDI
2 stops34h 11mUnited Airlines
Deal found 31/3£411
Mon 28/405:50GLA - SEA
1 stop13h 45mBritish Airways
Mon 5/520:20SEA - GLA
1 stop14h 10mBritish Airways
Deal found 31/3£449
Thu 15/508:40LHR - SEA
2 stops18h 57mAir Canada
Thu 22/507:20SEA - LHR
1 stop18h 40mAir Canada
Deal found 30/3£462
Mon 12/521:25LHR - SEA
1 stop28h 25mIcelandair
Fri 16/519:00SEA - LHR
1 stop32h 55mIcelandair
Deal found 31/3£464
Mon 2/615:40LGW - SEA
1 stop34h 10mIcelandair
Mon 16/623:30SEA - LGW
1 stop31h 10mIcelandair
Deal found 31/3£467
Sun 27/406:30LHR - SEA
1 stop13h 55mUnited Airlines
Sun 4/507:00SEA - LHR
2 stops18h 40mUnited Airlines
Deal found 31/3£467
Tue 29/408:45LHR - SEA
2 stops21h 58mSWISS
Tue 6/512:45SEA - LHR
2 stops25h 00mSWISS
Deal found 1/4£468
Thu 18/906:30LHR - SEA
1 stop13h 25mMultiple Airlines
Wed 24/905:45SEA - LHR
2 stops16h 45mMultiple Airlines
Deal found 1/4£469
Wed 21/506:55EDI - SEA
2 stops21h 33mMultiple Airlines
Wed 28/506:00SEA - EDI
2 stops20h 05mMultiple Airlines
Deal found 31/3£470
Tue 22/408:50LHR - SEA
1 stop16h 09mBritish Airways
Wed 30/420:20SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 31/3£472
Mon 21/406:30LHR - SEA
1 stop13h 15mDelta
Mon 28/420:20SEA - LHR
Nonstop9h 55mDelta
Deal found 1/4£474
Mon 21/413:25LHR - SEA
Nonstop10h 20mVirgin Atlantic
Mon 5/517:35SEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 31/3£478

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom to Seattle 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 858,174 searches. Data last updated 1 April 2025.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

United Kingdom

Fly to

Seattle

Route

Depart

Return

Price

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Sun 27/4

12:30-09:47

2 stops29h 17m

Seattle/Tacoma Intl

Sun 4/5

14:14-08:25

2 stops34h 11m

£411

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Mon 28/4

05:50-11:35

1 stop13h 45m

Seattle/Tacoma Intl

Mon 5/5

20:20-18:30

1 stop14h 10m

£449

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 15/5

08:40-19:37

2 stops18h 57m

Seattle/Tacoma Intl

Thu 22/5

07:20-10:00

1 stop18h 40m

£462

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 12/5

21:25-17:50

1 stop28h 25m

Seattle/Tacoma Intl

Fri 16/5

19:00-11:55

1 stop32h 55m

£464

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 2/6

15:40-17:50

1 stop34h 10m

Seattle/Tacoma Intl

Mon 16/6

23:30-14:40

1 stop31h 10m

£467

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 27/4

06:30-12:25

1 stop13h 55m

Seattle/Tacoma Intl

Sat 10/5

06:15-11:35

2 stops21h 20m

£467

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 29/4

08:45-22:43

2 stops21h 58m

Seattle/Tacoma Intl

Tue 6/5

12:45-21:45

2 stops25h 00m

£468

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 18/9

06:30-11:55

1 stop13h 25m

Seattle/Tacoma Intl

Wed 24/9

05:45-06:30

2 stops16h 45m

£469

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

Wed 21/5

06:55-20:28

2 stops21h 33m

Seattle/Tacoma Intl

Wed 28/5

06:00-10:05

2 stops20h 05m

£470

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 22/4

08:50-16:59

1 stop16h 09m

Seattle/Tacoma Intl

Wed 30/4

20:20-13:40

Nonstop9h 20m

£472

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Seattle

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

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Seattle

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £622). Flying from United Kingdom 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 GB to SEA?

Find hourly flight availability from United Kingdom 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 1 April 2025.

When flying from United Kingdom to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from United Kingdom to Seattle

Explore weekly flight availability from United Kingdom 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 1 April 2025.

The most flights from GB0 to SEA are scheduled on a Tuesday (21 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in Seattle by month

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

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

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 1 April 2025.
Peruse reviews from past customers who have flown with Emirates, Delta and KLM from United Kingdom to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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
8.0
Very Good
3,192 reviews
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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.
Delta
8.0
Very Good
7,899 reviews
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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.
KLM
7.8
Good
1,321 reviews
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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.
Finnair
7.6
Good
1,267 reviews
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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.
Austrian Airlines
7.6
Good
771 reviews
Emirates
8.0
Very Good
3,192 reviews
Check prices

Entertainment

8.2

Boarding

8.1

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jun 2024

DXB - IAH

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.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 United Kingdom?

    For a flight from United Kingdom to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • What are the cheapest airlines to fly from United Kingdom to Seattle one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as £287. Users have also found prices from £401 and £409 on Icelandair and Aer Lingus, respectively.

  • What are the most popular routes from United Kingdom to Seattle?

    The most popular flight routes from United Kingdom to Seattle are London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl and London City - Seattle/Tacoma Intl.

  • What are the most reliable airlines from United Kingdom to Seattle?

    The top 3 most reliable airlines when flying from United Kingdom to Seattle are Aeromexico (98%), Singapore Airlines (98%) and KLM (92%).

  • What are the cheapest flights from United Kingdom to Seattle?

    Looking for the cheapest flight from United Kingdom to Seattle? While on average our users pay £2,061, our data indicates the cheapest price to be £484. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £329.

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

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

  • How can I find direct flights from United Kingdom to Seattle?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Seattle?

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £622). Flying from United Kingdom 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

Travelling to a place near the United Kingdom?

Book flights to the United Kingdom if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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Alternative routes for United Kingdom to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from United Kingdom to Seattle

Discover the top 10 airlines that operate flights from United Kingdom to Seattle. 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 858,174 searches. Data last updated 1 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£8Average£814FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£338Average£579FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£400Average£639FlexibilityNo cancel feeOn-time77%
Search Air France flights
LufthansaCheapest£410Average£601FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£421Average£644FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£422Average£664FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£430Average£630FlexibilityNo cancel feeOn-time76%
Search Finnair flights
DeltaCheapest£446Average£671FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapest£450Average£682FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£463Average£642FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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 United Kingdom to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to Seattle from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from United Kingdom to Seattle, users can toggle the no change fees filter when performing a flight search.

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

Yes! Start tracking prices for United Kingdom to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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