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$356+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
1 adult, Economy
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Cheap 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 December 8, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/7. 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.
Tue 12/238:35 pmLHR - SEA
1 stop28h 25mIcelandair
Tue 1/62:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 12/7$643
This Icelandair deal was found by Cheapflights users on 12/7. 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.
Tue 12/238:35 pmLHR - SEA
1 stop28h 25mIcelandair
Wed 1/72:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 12/7$645
This Icelandair deal was found by Cheapflights users on 12/7. 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.
Wed 12/2411:55 amLGW - SEA
1 stop13h 05mIcelandair
Sun 12/282:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 12/7$710
This Mytrip deal was found by Cheapflights users on 12/7. 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.
Tue 12/238:35 pmLHR - SEA
1 stop28h 25mIcelandair
Sun 12/282:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 12/7$796
This Expedia deal was found by Cheapflights users on 12/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:35 amLHR - SEA
1 stop14h 45mMultiple Airlines
Thu 1/88:10 amSEA - LHR
1 stop14h 30mMultiple Airlines
Deal found 12/6$802
This ChecknFly deal was found by Cheapflights users on 12/6. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:35 amLHR - SEA
1 stop14h 45mLufthansa
Wed 1/78:40 amSEA - LHR
2 stops16h 30mLufthansa
Deal found 12/6$803
This Expedia deal was found by Cheapflights users on 12/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:35 amLHR - SEA
1 stop14h 45mMultiple Airlines
Mon 1/510:52 amSEA - LHR
1 stop35h 03mMultiple Airlines
Deal found 12/6$815
This United Airlines deal was found by Cheapflights users on 12/7. 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.
Fri 12/266:35 amLHR - SEA
1 stop14h 45mUnited Airlines
Mon 1/1910:58 amSEA - LHR
1 stop12h 57mUnited Airlines
Deal found 12/7$833
This United Airlines deal was found by Cheapflights users on 12/6. 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.
Tue 12/234:40 pmLHR - SEA
1 stop28h 40mUnited Airlines
Mon 1/511:15 pmSEA - LHR
1 stop23h 25mUnited Airlines
Deal found 12/6$835
This Expedia deal was found by Cheapflights users on 12/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:05 amLHR - SEA
1 stop17h 09mBritish Airways
Thu 1/86:50 pmSEA - LHR
Nonstop9h 30mBritish Airways
Deal found 12/6$844
This Cheapflightsfares deal was found by Cheapflights users on 12/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:35 pmGLA - SEA
2 stops16h 14mIcelandair
Fri 1/92:35 pmSEA - GLA
1 stop11h 20mIcelandair
Deal found 12/6$845
This Air Canada deal was found by Cheapflights users on 12/7. 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 12/272:30 pmLHR - SEA
1 stop32h 01mAir Canada
Mon 1/193:40 pmSEA - LHR
1 stop12h 10mAir Canada
Deal found 12/7$845

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 December 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$591
(Mytrip)

One-way from

$356
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$853

Good round-trip deal

$793 or less

Good one-way deal

$713 or less
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
Search Deals
From United Kingdom to Seattle/Tacoma Intl
Search Deals
One-way flight from United Kingdom to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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

 
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 December 8, 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

Wed 1/21

7:25 am-5:00 pm

2 stops17h 35m

Seattle/Tacoma Intl

Wed 1/28

2:35 pm-10:15 pm

2 stops23h 40m

$591

BristolSeattle

BRS - SEA

BRSSEA

Bristol

Wed 1/21

9:00 am-5:00 pm

2 stops16h 00m

Seattle/Tacoma Intl

Wed 1/28

2:35 pm-1:25 pm

2 stops14h 50m

$594

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 3/2

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 3/18

3:35 pm-10:55 am

1 stop12h 20m

$628

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 3/6

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 3/18

3:35 pm-10:55 am

1 stop12h 20m

$628

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 3/7

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 3/18

3:35 pm-10:55 am

1 stop12h 20m

$628

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 3/1

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 3/18

3:35 pm-10:55 am

1 stop12h 20m

$628

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 3/5

2:00 pm-12:30 pm

2 stops30h 30m

Seattle/Tacoma Intl

Tue 3/17

10:51 pm-6:00 am

1 stop24h 09m

$660

LondonSeattle

STN - SEA

STNSEA

London Stansted

Wed 1/21

8:05 am-11:25 am

2 stops35h 20m

Seattle/Tacoma Intl

Sat 1/31

1:40 pm-6:00 pm

2 stops20h 20m

$670

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 5/20

7:50 pm-1:45 pm

2 stops49h 55m

Seattle/Tacoma Intl

Tue 6/2

3:55 pm-4:00 pm

1 stop16h 05m

$681

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 3/2

11:45 am-11:35 am

1 stop31h 50m

Seattle/Tacoma Intl

Thu 3/19

11:47 am-7:05 am

1 stop12h 18m

$691

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

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, March is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $408). Flying from United Kingdom to Seattle in August is currently the most expensive (average of $617). 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 December 8, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from United Kingdom to Seattle by exploring options for tickets at noon.

What is the cheapest day to fly from United Kingdom to Seattle?

Use this chart to determine the cheapest time to fly round-trip from United Kingdom to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their United Kingdom to Seattle flight should consider departing on Monday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 8, 2025.

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

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

About 13% of weekly flights between United Kingdom and Seattle have experienced delays in the past year, with the average delay time being 116 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?

Tuesday tends to have the lowest number of delays on this route, whereas Wednesday 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 last year, Delta have had the lowest number of delays on this route, with just 6% of flights being delayed.

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 December 8, 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.
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,013 reviews
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
675 reviews
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,041 reviews
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.0
Good
586 reviews
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,564 reviews
Delta
7.9
Good
8,013 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    Icelandair, Scandinavian Airlines, and Delta can get you from United Kingdom to Seattle in just under 13h 05m. Your travel time can differ by up to 36h 50m. The distance between United Kingdom and Seattle is about 4807 mi. This flight may include one or multiple stops.

  • 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 $364. Users have also found prices from $383 and $431 on Scandinavian Airlines and Aer Lingus, respectively.

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

    Most travelers choose London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl when deciding on the best route 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 (95%), Air France (88%) and Delta (85%).

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

    While on average a flight from United Kingdom to Seattle is generally $2,179, our data shows the cheapest flight currently is $542. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $498 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, March is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $408). Flying from United Kingdom to Seattle in August is currently the most expensive (average of $617). 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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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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Edinburgh to Seattle flights

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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$418Average$836FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$849FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$574Average$869FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$589Average$854FlexibilityNo cancel feeOn-time71%
DeltaCheapest$594Average$825FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$780Average$780FlexibilityNo cancel feeOn-time77%

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