Seattle

$388+ Cheap flights from the United Kingdom to Seattle (SEA)

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
Aug 19 — Aug 261
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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 August 14, 2025.

Round-trip from

$576
(Mytrip)

One-way from

$388
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$941

Good round-trip deal

$753 or less

Good one-way deal

$806 or less
From United Kingdom to Seattle/Tacoma Intl
One-way flight from United Kingdom to Seattle/Tacoma Intl
Highest demand for flights based on searches. 12% potential increase in price ($109 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from United Kingdom to Seattle/Tacoma Intl.
Price to beat on a one-way flight from United Kingdom to Seattle/Tacoma Intl.

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 August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/289:35 amEDI - SEA
2 stops19h 05mMultiple Airlines
Sun 10/53:45 pmSEA - EDI
2 stops17h 20mMultiple Airlines
Deal found 8/14$576
This Trip.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1910:55 amLGW - SEA
2 stops41h 44mMultiple Airlines
Sun 9/2110:10 amSEA - LGW
1 stop16h 45mMultiple Airlines
Deal found 8/14$641
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/19:30 amLHR - SEA
2 stops19h 24mUnited Airlines
Wed 11/268:00 amSEA - LHR
1 stop14h 40mUnited Airlines
Deal found 8/13$641
This Air Canada deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:30 amLHR - SEA
2 stops15h 46mMultiple Airlines
Sat 9/277:00 amSEA - LHR
2 stops15h 30mMultiple Airlines
Deal found 8/13$642
This Kiwi.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:05 pmLGW - SEA
1 stop16h 46mMultiple Airlines
Sat 10/1110:55 pmSEA - LGW
1 stop23h 25mMultiple Airlines
Deal found 8/14$643
This Air Canada deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:40 amLHR - SEA
2 stops17h 56mMultiple Airlines
Sun 9/145:30 amSEA - LHR
2 stops17h 00mMultiple Airlines
Deal found 8/14$643
This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/261:00 pmLGW - SEA
1 stop12h 50mIcelandair
Wed 9/33:45 pmSEA - LGW
1 stop12h 00mIcelandair
Deal found 8/12$644
This Lufthansa deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:30 amLHR - SEA
1 stop13h 25mLufthansa
Mon 9/291:57 pmSEA - LHR
1 stop13h 48mLufthansa
Deal found 8/13$644
This TravelTrolley deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelTrolley is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:25 pmLHR - SEA
Nonstop10h 25mVirgin Atlantic
Tue 9/238:25 pmSEA - LHR
Nonstop9h 50mVirgin Atlantic
Deal found 8/12$645
This Icelandair deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/23:40 pmLGW - SEA
1 stop13h 00mIcelandair
Sat 10/117:00 pmSEA - LGW
1 stop11h 40mIcelandair
Deal found 8/14$646
This Gotogate deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/153:40 pmLGW - SEA
1 stop34h 10mIcelandair
Mon 9/297:00 pmSEA - LGW
1 stop11h 35mIcelandair
Deal found 8/13$647
This Air Canada deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/286:30 amLHR - SEA
2 stops15h 46mMultiple Airlines
Sun 10/510:00 amSEA - LHR
2 stops15h 35mMultiple Airlines
Deal found 8/14$647

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated August 14, 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 9/28

9:35 am-8:40 pm

2 stops19h 05m

Seattle/Tacoma Intl

Sun 10/5

3:45 pm-5:05 pm

2 stops17h 20m

$576

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 10/3

6:30 am-11:55 am

1 stop13h 25m

Seattle/Tacoma Intl

Sat 10/11

2:55 pm-1:20 pm

1 stop14h 25m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/1

9:30 am-8:54 pm

2 stops19h 24m

Seattle/Tacoma Intl

Wed 11/26

8:00 am-6:40 am

1 stop14h 40m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 8/29

6:40 am-1:50 pm

1 stop15h 10m

Seattle/Tacoma Intl

Fri 9/5

4:00 pm-2:35 pm

2 stops14h 35m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 9/12

8:40 am-6:36 pm

2 stops17h 56m

Seattle/Tacoma Intl

Sun 9/14

5:30 am-6:30 am

2 stops17h 00m

$641

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 9/19

10:55 am-8:39 pm

2 stops41h 44m

Seattle/Tacoma Intl

Sun 9/21

10:10 am-10:55 am

1 stop16h 45m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/1

9:30 am-8:54 pm

2 stops19h 24m

Seattle/Tacoma Intl

Wed 11/5

7:00 am-5:55 am

1 stop14h 55m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 9/27

6:30 am-2:16 pm

2 stops15h 46m

Seattle/Tacoma Intl

Sat 10/4

5:30 am-6:30 am

2 stops17h 00m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 11/11

7:30 am-6:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Fri 11/14

1:20 pm-1:30 pm

2 stops16h 10m

$641

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 9/19

6:30 am-2:16 pm

2 stops15h 46m

Seattle/Tacoma Intl

Sun 9/21

7:15 am-6:30 am

1 stop15h 15m

$641

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 round-trip 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 $238). Flying from United Kingdom to Seattle in June is currently the most expensive (average of $389). 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 August 14, 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 August 14, 2025.

The most flights from GB0 to SEA are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

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 August 14, 2025.
See what other customers who have flown with Delta, Virgin Atlantic, and American Airlines from the United Kingdom to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very good
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
8.0
Very good

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 most popular routes from United Kingdom to Seattle?

  • 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 Scandinavian Airlines (97%), KLM (93%) and Air France (93%).

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

    While on average a flight from United Kingdom to Seattle is generally $2,417, our data shows the cheapest flight currently is $671. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $546 for that flight.

  • 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 vacation 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 $238). Flying from United Kingdom to Seattle in June is currently the most expensive (average of $389). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from United Kingdom to Seattle

Discover the top 6 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 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$775FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$837FlexibilityNo cancel feeOn-time70%
IberiaCheapest$575Average$772FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$594Average$911FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$620Average$789FlexibilityNo cancel feeOn-time71%
DeltaCheapest$621Average$825FlexibilityNo cancel feeOn-timeN/A

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