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$378+ 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 6/28. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
maj 19 — maj 261
tir. 5/19
tir. 5/26
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 april 19, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
ons. 4/226:30 am
STN
-
SEA
1 stop18h 40m
Multiple Airlines
søn. 4/267:10 pm
SEA
-
STN
1 stop20h 15m
Multiple Airlines
Deal found 4/14$692
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
man. 4/273:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
lør. 5/27:00 pm
SEA
-
LGW
1 stop11h 35m
Icelandair
Deal found 4/14$694
This Trip.com deal was found by Cheapflights users on 4/14. 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.
ons. 4/222:10 pm
LHR
-
SEA
1 stop32h 09m
Multiple Airlines
søn. 4/267:00 pm
SEA
-
LHR
2 stops16h 55m
Multiple Airlines
Deal found 4/14$694
This oojo deal was found by Cheapflights users on 4/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 8/253:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
tir. 9/87:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 4/14$695
This FlightHub deal was found by Cheapflights users on 4/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 5/273:40 pm
LGW
-
SEA
1 stop28h 05m
Icelandair
tor. 10/17:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 4/16$696
This Trip.com deal was found by Cheapflights users on 4/14. 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.
tir. 6/233:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
tor. 9/247:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 4/14$697
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
ons. 10/71:05 pm
LHR
-
SEA
1 stop12h 50m
Icelandair
ons. 10/143:40 pm
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 4/14$697
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
ons. 4/226:15 am
LTN
-
SEA
1 stop18h 55m
Multiple Airlines
søn. 4/267:10 pm
SEA
-
LTN
1 stop18h 30m
Multiple Airlines
Deal found 4/14$697
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 5/13:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
tir. 5/127:00 pm
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 4/14$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 5/19:50 am
LHR
-
SEA
Nonstop9h 45m
British Airways
ons. 5/68:20 pm
SEA
-
LHR
Nonstop9h 25m
British Airways
Deal found 4/14$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 5/13:40 pm
LGW
-
SEA
1 stop13h 00m
Icelandair
man. 5/113:40 pm
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 4/14$699
This TravelTrolley deal was found by Cheapflights users on 4/16. 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.
ons. 6/248:55 am
LHR
-
SEA
1 stop16h 35m
Virgin Atlantic
ons. 7/2210:40 pm
SEA
-
LHR
1 stop13h 30m
Virgin Atlantic
Deal found 4/16$699

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 april 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$694

One-way from

$378
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$723

Good round-trip deal

$869 or less

Good one-way deal

$694 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. 11% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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

 
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 april 19, 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 round-trip

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ons. 7/1

4:30 pm-6:25 pm

Nonstop9h 55m

Seattle/Tacoma Intl

ons. 7/8

8:20 pm-1:45 pm

Nonstop9h 25m

$733

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ons. 6/10

4:30 pm-6:25 pm

Nonstop9h 55m

Seattle/Tacoma Intl

man. 6/15

6:00 am-9:05 am

1 stop19h 05m

$747

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

tir. 5/19

6:30 am-11:42 am

1 stop13h 12m

Seattle/Tacoma Intl

man. 5/25

6:20 pm-12:10 pm

Nonstop9h 50m

$753
Quickest round-trip

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ons. 8/12

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

ons. 8/26

1:30 pm-6:45 am

Nonstop9h 15m

$753

LondonSeattle

LTN - SEA

LTNSEA

London Luton

fre. 5/15

6:20 am-5:10 pm

1 stop18h 50m

Seattle/Tacoma Intl

lør. 5/23

7:10 pm-9:55 pm

1 stop18h 45m

$755

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

ons. 6/17

6:30 am-11:37 am

1 stop13h 07m

Seattle/Tacoma Intl

fre. 7/17

6:00 am-7:15 am

1 stop17h 15m

$761

EdinburghSeattle

EDI - SEA

EDISEA

Edinburgh Turnhouse

fre. 5/29

1:40 pm-11:45 am

2 stops30h 05m

Seattle/Tacoma Intl

fre. 6/5

11:25 pm-12:20 am

2 stops16h 55m

$770

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

tor. 5/28

7:10 pm-1:45 pm

1 stop26h 35m

Seattle/Tacoma Intl

fre. 6/12

3:55 pm-8:55 am

1 stop33h 00m

$773

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

tor. 6/11

10:25 am-5:30 pm

1 stop15h 05m

Seattle/Tacoma Intl

søn. 6/14

6:50 pm-4:00 pm

1 stop13h 10m

$774

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

tir. 8/25

6:15 am-11:15 am

1 stop13h 00m

Seattle/Tacoma Intl

ons. 9/2

2:30 pm-3:00 pm

1 stop16h 30m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $390). Flying from United Kingdom to Seattle in December is currently the most expensive (average of $1,218). 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 april 19, 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 april 19, 2026.

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 (16 on average).

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

About 11% of weekly flights between United Kingdom and Seattle have experienced delays in the past year, with the average delay time being 128 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 Monday 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 5% 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 april 19, 2026.
See what other customers who have flown with Delta,Virgin Atlantic, andAmerican 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
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
8,424 reviews
Delta
7.9
Good
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
687 reviews
Delta
7.9
Good
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
7.1
Good
11,617 reviews
Delta
7.9
Good
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
636 reviews
Delta
7.9
Good
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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
7,891 reviews
Delta
7.9
Good
8,424 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Boarding

8.1

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?

    Virgin Atlantic, Icelandair, and British Airways can get you from United Kingdom to Seattle in just under 9h 45m. Your travel time can differ by up to 3h 05m. The distance between United Kingdom and Seattle is about 4783 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 Icelandair. According to our data, you can fly for as low as $368. Users have also found prices from $469 and $474 on Aer Lingus and Virgin Atlantic, 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 Stansted - 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 KLM (95%), Delta (94%) and Virgin Atlantic (94%).

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

    While on average a flight from United Kingdom to Seattle is generally $1,651, our data shows the cheapest flight currently is $539. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $398 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, February is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $390). Flying from United Kingdom to Seattle in December is currently the most expensive (average of $1,218). 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
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Kent
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Renton
Puyallup
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

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 april 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$403Average$677FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$574Average$853FlexibilityNo cancel feeOn-time72%
DeltaCheapest$594Average$1,009FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$618Average$985FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$660Average$922FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$780Average$780FlexibilityNo cancel feeOn-time77%

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