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Cheap flights from the United Kingdom to Seattle from £304

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
13 Jul — 20 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Seattle

Enter your travel dates to find the best prices.

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 13 June 2026.

Fri 17/712:20
BHX
-
SEA
1 stop12h 50m
Aer Lingus
Tue 28/719:10
SEA
-
BHX
1 stop12h 55m
Aer Lingus
Deal found 11/6£476
Sat 25/708:10
BHX
-
SEA
1 stop17h 00m
Aer Lingus
Sat 1/819:10
SEA
-
BHX
1 stop17h 55m
Aer Lingus
Deal found 13/6£479
Mon 31/812:20
BHX
-
SEA
1 stop12h 50m
Aer Lingus
Mon 21/919:10
SEA
-
BHX
1 stop12h 55m
Aer Lingus
Deal found 10/6£481
Thu 9/712:20
BHX
-
SEA
1 stop12h 50m
Aer Lingus
Sun 19/719:10
SEA
-
BHX
1 stop12h 55m
Aer Lingus
Deal found 13/6£482
Wed 2/920:10
MAN
-
SEA
2 stops27h 50m
Multiple Airlines
Tue 15/918:05
SEA
-
MAN
3 stops34h 35m
Multiple Airlines
Deal found 12/6£483
Sun 6/914:20
GLA
-
SEA
1 stop11h 35m
Icelandair
Sun 20/919:00
SEA
-
GLA
1 stop10h 25m
Icelandair
Deal found 11/6£497
Fri 10/712:00
GLA
-
SEA
1 stop13h 10m
Aer Lingus
Fri 24/719:10
SEA
-
GLA
1 stop17h 30m
Aer Lingus
Deal found 13/6£509
Wed 24/615:00
EDI
-
SEA
3 stops38h 00m
Multiple Airlines
Mon 17/815:40
SEA
-
EDI
2 stops24h 55m
Multiple Airlines
Deal found 10/6£509
Fri 25/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sun 28/214:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 9/6£517
Thu 9/709:15
EDI
-
SEA
1 stop15h 55m
Aer Lingus
Sat 25/719:10
SEA
-
EDI
1 stop15h 55m
Aer Lingus
Deal found 11/6£517
Sat 5/910:00
LCY
-
SEA
1 stop14h 35m
Virgin Atlantic
Sat 12/917:45
SEA
-
LCY
1 stop18h 30m
Virgin Atlantic
Deal found 9/6£517
Sat 5/917:45
LHR
-
SEA
Nonstop10h 25m
Delta
Fri 2/1021:50
SEA
-
LHR
Nonstop9h 45m
Delta
Deal found 11/6£517

Find 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 13 June 2026.

Round-trip from

£476

One-way from

£304

Popular in

July

Cheapest in

February

Average price

£623

Good round-trip deal

£596 or less

Good one-way deal

£603 or less
Aer Lingus
  • Aer Lingus
  • 17/7-28/7
  • 2 total stops
  • 25h 45m total
  • United Kingdom to Seattle
Search Deals
24/9
  • 24/9
  • 2 total stops
  • 33h 35m total
  • United Kingdom to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from United Kingdom to Seattle/Tacoma Intl.
Search Deals

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 13 June 2026.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 7/9

10:25-23:57

2 stops21h 32m

Seattle/Tacoma Intl

Wed 7/10

18:45-16:00

1 stop13h 15m

£517

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 4/9

17:45-20:10

Nonstop10h 25m

Seattle/Tacoma Intl

Wed 16/9

18:20-12:10

Nonstop9h 50m

£518

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 7/11

16:45-10:55

2 stops26h 10m

Seattle/Tacoma Intl

Mon 7/12

14:05-15:45

1 stop17h 40m

£522

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 28/9

17:45-20:10

Nonstop10h 25m

Seattle/Tacoma Intl

Sat 13/3

16:45-10:30

Nonstop9h 45m

£523

LondonSeattle

LCY - SEA

LCYSEA

London City

Mon 13/7

07:45-16:20

1 stop16h 35m

Seattle/Tacoma Intl

Mon 20/7

13:45-09:30

1 stop11h 45m

£524

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 16/7

17:45-20:03

Nonstop10h 18m

Seattle/Tacoma Intl

Thu 23/7

21:50-15:35

Nonstop9h 45m

£526
Fastest return journey

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 25/6

17:45-20:01

Nonstop10h 16m

Seattle/Tacoma Intl

Mon 29/6

22:05-15:35

Nonstop9h 30m

£527

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 5/9

10:25-23:20

2 stops20h 55m

Seattle/Tacoma Intl

Sat 12/9

13:30-09:20

1 stop11h 50m

£530

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sun 13/9

08:45-18:32

2 stops17h 47m

Seattle/Tacoma Intl

Tue 22/9

15:30-17:50

2 stops18h 20m

£536

Newcastle upon TyneSeattle

NCL - SEA

NCLSEA

Newcastle upon Tyne

Sat 31/10

06:40-17:55

1 stop18h 15m

Seattle/Tacoma Intl

Wed 4/11

18:50-16:00

1 stop13h 10m

£539

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, February is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £291). Flying from United Kingdom to Seattle in December is currently the most expensive (average of £917). 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 13 June 2026.

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 13 June 2026.

The most flights from GB0 to SEA are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (17 on average).

How often are flights from the United Kingdom to Seattle delayed?

About 10% of weekly flights between United Kingdom and Seattle have experienced delays in the past year, with the average delay time being 118 minutes.

What is the most punctual flight time for the United Kingdom to Seattle flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on the United Kingdom to Seattle flights?

Over the past year, Delta have had the lowest number of delays on this route, with just 5% of flights being delayed.

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

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 13 June 2026.
Read reviews from past customers who have flown with KLM,Virgin Atlantic, andAer Lingus from the United Kingdom to Seattle. 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.
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,529 reviews
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.5
Good
690 reviews
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Aer Lingus
7.3
Good
1,603 reviews
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Icelandair
7.0
Good
674 reviews
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,047 reviews
KLM
7.8
Good
1,529 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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.

  • How long is the flight from United Kingdom to Seattle?

    A quick flight from United Kingdom to Seattle can take about 10h 25m. Virgin Atlantic provides one of the quickest options available for as low as £518. Airlines will cover a distance of 4783 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as £283. Users have also found prices from £353 and £371 on Icelandair and British Airways, 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 KLM (88%), Air France (88%) and Delta (88%).

  • 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 £1,724, our data indicates the cheapest price to be £446. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around £357.

  • 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, February is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of £291). Flying from United Kingdom to Seattle in December is currently the most expensive (average of £917). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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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 13 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£335Average£556FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest£341Average£555FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£363Average£621FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£374Average£629FlexibilityNo cancel feeOn-time75%
Search KLM flights
Aer LingusCheapest£418Average£748FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£426Average£675FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapest£450Average£707FlexibilityNo cancel feeOn-time77%
Search Air France flights
Scandinavian AirlinesCheapest£460Average£678FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
DeltaCheapest£463Average£633FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£464Average£498FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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