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$384+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
nov. 21 — nov. 281
vie. 11/21
vie. 11/28
1 adult, Economy
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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 octubre 22, 2025.

This Gotogate deal was found by Cheapflights users on 10/22. 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.
mié. 11/512:15 pmLHR - SEA
1 stop12h 45mIcelandair
mié. 4/297:00 pmSEA - LHR
1 stop32h 55mIcelandair
Deal found 10/22$595
This Booking.com deal was found by Cheapflights users on 10/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/178:35 pmLHR - SEA
1 stop28h 25mIcelandair
lun. 12/12:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/20$597
This Gotogate deal was found by Cheapflights users on 10/22. 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.
dom. 12/148:35 pmLHR - SEA
1 stop28h 25mIcelandair
mar. 1/62:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/22$600
This Gotogate deal was found by Cheapflights users on 10/22. 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.
mié. 11/1912:15 pmLHR - SEA
1 stop12h 45mIcelandair
mié. 11/262:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 10/22$601
This Booking.com deal was found by Cheapflights users on 10/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1711:55 amLGW - SEA
1 stop13h 05mIcelandair
lun. 12/12:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/20$602
This Gotogate deal was found by Cheapflights users on 10/20. 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.
mié. 12/1011:55 amLGW - SEA
1 stop13h 05mIcelandair
lun. 12/152:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 10/20$604
This Gotogate deal was found by Cheapflights users on 10/22. 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.
lun. 11/38:35 pmLHR - SEA
1 stop28h 25mIcelandair
lun. 11/102:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 10/22$604
This Gotogate deal was found by Cheapflights users on 10/20. 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.
mié. 11/1212:15 pmLHR - SEA
1 stop12h 45mIcelandair
jue. 12/42:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 10/20$605
This Gotogate deal was found by Cheapflights users on 10/21. 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.
mié. 11/512:15 pmLHR - SEA
1 stop12h 45mIcelandair
mié. 11/122:35 pmSEA - LHR
1 stop12h 15mIcelandair
Deal found 10/21$607
This Gotogate deal was found by Cheapflights users on 10/20. 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.
mar. 11/258:35 pmLHR - SEA
1 stop28h 25mIcelandair
mié. 12/102:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/20$608
This Flightnetwork deal was found by Cheapflights users on 10/22. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/108:35 pmLHR - SEA
1 stop28h 25mIcelandair
lun. 11/172:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/22$609
This The Travel House deal was found by Cheapflights users on 10/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/212:15 pmLHR - SEA
1 stop12h 45mIcelandair
mar. 12/92:35 pmSEA - LHR
1 stop20h 55mIcelandair
Deal found 10/20$612

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 octubre 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$595
(Mytrip)

One-way from

$384
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$726

Good round-trip deal

$775 or less

Good one-way deal

$656 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 ($104 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 October 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 octubre 22, 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

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

mié. 11/12

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

lun. 11/24

2:35 pm-10:55 am

1 stop12h 20m

$638

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

lun. 11/24

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

mar. 12/2

2:35 pm-10:55 am

1 stop12h 20m

$639

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

jue. 12/25

6:30 am-11:50 am

1 stop13h 20m

Seattle/Tacoma Intl

mié. 12/31

4:48 pm-10:30 am

Nonstop9h 42m

$646

BristolSeattle

BRS - SEA

BRSSEA

Bristol

jue. 12/4

8:20 am-5:00 pm

2 stops16h 40m

Seattle/Tacoma Intl

jue. 12/11

2:35 pm-9:40 pm

2 stops23h 05m

$650

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

mar. 3/10

6:30 am-12:35 pm

1 stop13h 05m

Seattle/Tacoma Intl

mar. 3/17

8:20 pm-12:50 pm

Nonstop9h 30m

$655

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

lun. 12/29

6:30 am-6:26 pm

2 stops19h 56m

Seattle/Tacoma Intl

mié. 3/4

9:30 am-10:00 am

2 stops16h 30m

$659

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

lun. 12/29

6:30 am-6:26 pm

2 stops19h 56m

Seattle/Tacoma Intl

jue. 3/5

4:45 pm-10:30 am

Nonstop9h 45m

$659

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

lun. 12/29

6:30 am-6:26 pm

2 stops19h 56m

Seattle/Tacoma Intl

mar. 3/17

6:05 am-6:55 am

2 stops17h 50m

$659

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

vie. 12/26

6:30 am-11:50 am

1 stop13h 20m

Seattle/Tacoma Intl

mar. 12/30

7:20 pm-12:50 pm

Nonstop9h 30m

$661

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

lun. 11/17

6:30 am-12:10 pm

1 stop13h 40m

Seattle/Tacoma Intl

lun. 12/1

5:45 am-11:50 am

1 stop22h 05m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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 $410). 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 octubre 22, 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. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 octubre 22, 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
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Delta
7.9
Good
7,977 reviews
Delta
7.9
Good
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Virgin Atlantic
7.5
Good
670 reviews
Delta
7.9
Good
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
American Airlines
7.2
Good
11,028 reviews
Delta
7.9
Good
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
Icelandair
7.0
Good
560 reviews
Delta
7.9
Good
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!
British Airways
6.7
Okay
7,466 reviews
Delta
7.9
Good
7,977 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Mary,Oct 2025

AMS - PDX

It's specail being able to fly non-stop from Amsterdam all the way home to Portland, Oregon!

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, Delta, and Virgin Atlantic can get you from United Kingdom to Seattle in just under 13h 05m. Your travel time can differ by up to 7h 55m. 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 Lufthansa. According to our data, you can fly for as low as $536. Users have also found prices from $553 and $564 on United Airlines and SWISS, 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%), KLM (87%) and Air France (87%).

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

    While on average a flight from United Kingdom to Seattle is generally $2,279, our data shows the cheapest flight currently is $555. When looking at the most popular route, (London Heathrow - Seattle/Tacoma Intl), you can expect to pay $543 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 $410). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Fife
Issaquah

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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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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 octubre 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$418Average$772FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$832FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$589Average$813FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$594Average$906FlexibilityNo cancel feeOn-time72%
DeltaCheapest$600Average$825FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$780Average$780FlexibilityNo cancel feeOn-time77%

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