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$336+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
Apr 8 — Apr 151
Wed 4/8
Wed 4/15
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 March 9, 2026.

This deal was found by Cheapflights users on 3/9. 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.
Thu 4/91:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Mon 4/273:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$524
This deal was found by Cheapflights users on 3/9. 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.
Thu 4/91:05 pm
MAN
-
SEA
1 stop15h 35m
Icelandair
Tue 4/283:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$526
This deal was found by Cheapflights users on 3/9. 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.
Wed 4/151:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Mon 4/273:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$528
This deal was found by Cheapflights users on 3/9. 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.
Mon 4/131:05 pm
MAN
-
SEA
1 stop15h 35m
Icelandair
Tue 4/283:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$529
This flugladen.de deal was found by Cheapflights users on 3/5. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:00 am
LGW
-
SEA
2 stops17h 40m
Multiple Airlines
Mon 4/273:40 pm
SEA
-
LGW
2 stops19h 35m
Multiple Airlines
Deal found 3/5$531
This deal was found by Cheapflights users on 3/4. 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.
Sat 6/66:40 am
LHR
-
SEA
1 stop15h 05m
Scandinavian Airlines
Sun 6/143:55 pm
SEA
-
LHR
1 stop16h 05m
Scandinavian Airlines
Deal found 3/4$535
This Trip.com deal was found by Cheapflights users on 3/4. 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.
Thu 4/99:20 am
LGW
-
SEA
2 stops19h 20m
Multiple Airlines
Sun 4/193:40 pm
SEA
-
LGW
2 stops20h 30m
Multiple Airlines
Deal found 3/4$542
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Sun 4/197:25 pm
MAN
-
SEA
2 stops54h 17m
Multiple Airlines
Sun 4/263:40 pm
SEA
-
MAN
1 stop12h 00m
Multiple Airlines
Deal found 3/5$544
This deal was found by Cheapflights users on 3/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Tue 5/193:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/6$546
This deal was found by Cheapflights users on 3/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:05 pm
MAN
-
SEA
1 stop15h 35m
Icelandair
Tue 5/193:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/6$547
This deal was found by Cheapflights users on 3/9. 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.
Thu 4/91:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Sun 4/263:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$549
This deal was found by Cheapflights users on 3/9. 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.
Wed 4/151:05 pm
MAN
-
SEA
1 stop12h 50m
Icelandair
Sun 4/263:40 pm
SEA
-
MAN
1 stop12h 00m
Icelandair
Deal found 3/9$553

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 March 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$531
(flugladen.de)

One-way from

$336
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$720

Good round-trip deal

$814 or less

Good one-way deal

$598 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 ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 9, 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

LGW - SEA

LGWSEA

London Gatwick

Wed 4/22

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sun 4/26

7:00 pm-2:40 pm

1 stop11h 40m

$613

BirminghamSeattle

BHX - SEA

BHXSEA

Birmingham

Wed 4/22

8:30 am-5:55 pm

2 stops17h 25m

Seattle/Tacoma Intl

Wed 4/29

3:40 pm-5:35 pm

2 stops17h 55m

$640

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 4/25

9:25 pm-8:40 pm

1 stop31h 15m

Seattle/Tacoma Intl

Sat 5/2

7:00 pm-8:20 pm

1 stop17h 20m

$647

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 5/22

6:40 am-1:45 pm

1 stop15h 05m

Seattle/Tacoma Intl

Sat 6/13

3:55 pm-5:40 pm

1 stop17h 45m

$672

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Sat 6/20

8:40 am-9:00 pm

2 stops20h 20m

Seattle/Tacoma Intl

Wed 9/2

7:10 pm-9:15 pm

1 stop18h 05m

$702

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Wed 4/22

1:05 pm-5:55 pm

1 stop12h 50m

Seattle/Tacoma Intl

Sun 4/26

3:40 pm-11:40 am

1 stop12h 00m

$721

GlasgowSeattle

GLA - SEA

GLASEA

Glasgow Intl

Wed 4/22

2:20 pm-8:40 pm

1 stop14h 20m

Seattle/Tacoma Intl

Sun 4/26

3:40 pm-1:25 pm

1 stop13h 45m

$729

LondonSeattle

LTN - SEA

LTNSEA

London Luton

Mon 4/20

9:15 am-7:23 pm

3 stops42h 08m

Seattle/Tacoma Intl

Mon 5/4

7:00 pm-10:05 pm

2 stops19h 05m

$733

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Thu 6/4

7:10 pm-1:45 pm

1 stop26h 35m

Seattle/Tacoma Intl

Fri 6/19

3:55 pm-8:55 am

2 stops33h 00m

$757

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/22

7:25 am-4:59 pm

1 stop17h 34m

Seattle/Tacoma Intl

Wed 4/29

8:55 am-10:40 am

2 stops17h 45m

$758

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

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, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $468). Flying from United Kingdom to Seattle in August is currently the most expensive (average of $625). 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 March 9, 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 March 9, 2026.

The most flights from GB0 to SEA are scheduled on a Monday (15 on average). You will have fewer flight options on Wednesday, 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 11% of weekly flights between United Kingdom and Seattle have experienced delays in the past year, with the average delay time being 124 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 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 March 9, 2026.
See what other customers who have flown with Delta, Virgin Atlantic, and Air France 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
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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
8,275 reviews
Delta
7.9
Good
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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
680 reviews
Delta
7.9
Good
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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.
Air France
7.4
Good
1,543 reviews
Delta
7.9
Good
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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
7.1
Good
619 reviews
Delta
7.9
Good
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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
7,781 reviews
Delta
7.9
Good
8,275 reviews

Boarding

8.1

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

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 United Airlines can get you from United Kingdom to Seattle in just under 13h. Your travel time can differ by up to 4h 34m. 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 Icelandair. According to our data, you can fly for as low as $368. Users have also found prices from $383 and $410 on Scandinavian Airlines and WestJet, 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 (93%), Air France (93%) and Delta (93%).

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

    While on average a flight from United Kingdom to Seattle is generally $1,484, our data shows the cheapest flight currently is $468. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $575 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 $468). Flying from United Kingdom to Seattle in August is currently the most expensive (average of $625). 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
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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 March 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$501Average$881FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$574Average$828FlexibilityNo cancel feeOn-time72%
DeltaCheapest$594Average$1,009FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$618Average$891FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$660Average$885FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$780Average$780FlexibilityNo cancel feeOn-time77%

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