$372+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
Feb 20 — Feb 271
1 adult, Economy
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Cheapest flights from United Kingdom to SeattleExplore 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 January 21, 2026.
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 January 21, 2026.
This Booking.com deal was found by Cheapflights users on 1/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:00 pm
LGW
- SEA
1 stop15h 40m
Icelandair
Thu 6/43:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 1/21![Icelandair logo]()
$502
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:35 am
LHR
- SEA
1 stop14h 45m
United Airlines
Wed 2/188:17 am
SEA
- LHR
2 stops39h 13m
United Airlines
Deal found 1/21![United Airlines logo]()
$503
This deal was found by Cheapflights users on 1/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/123:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Fri 6/197:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 1/21![Icelandair logo]()
$505
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:30 am
LHR
- SEA
2 stops18h 34m
United Airlines
Tue 3/175:00 am
SEA
- LHR
1 stop19h 25m
United Airlines
Deal found 1/21![United Airlines logo]()
$505
This TravelUp deal was found by Cheapflights users on 1/21. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1812:20 pm
LHR
- SEA
Nonstop10h 25m
Virgin Atlantic
Wed 2/258:30 am
SEA
- LHR
1 stop16h 15m
Virgin Atlantic
Deal found 1/21![Virgin Atlantic logo]()
$506
This Lufthansa deal was found by Cheapflights users on 1/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:15 pm
LHR
- SEA
1 stop25h 05m
Lufthansa
Tue 2/249:55 am
SEA
- LHR
2 stops16h 15m
Lufthansa
Deal found 1/20![Lufthansa logo]()
$507
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3111:55 am
LGW
- SEA
1 stop13h 05m
Icelandair
Tue 2/102:35 pm
SEA
- LGW
1 stop12h 20m
Icelandair
Deal found 1/21![Icelandair logo]()
$508
This TravelUp deal was found by Cheapflights users on 1/21. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/211:45 am
LHR
- SEA
1 stop31h 55m
Virgin Atlantic
Mon 2/167:30 am
SEA
- LHR
1 stop16h 20m
Virgin Atlantic
Deal found 1/21![Virgin Atlantic logo]()
$508
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/241:05 pm
LHR
- SEA
1 stop15h 35m
Icelandair
Sun 5/37:00 pm
SEA
- LHR
1 stop17h 20m
Icelandair
Deal found 1/20![Icelandair logo]()
$509
This SWISS deal was found by Cheapflights users on 1/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:25 am
LGW
- SEA
2 stops22h 04m
SWISS
Mon 5/119:55 am
SEA
- LGW
2 stops23h 55m
SWISS
Deal found 1/20![SWISS logo]()
$510
This Trip.com deal was found by Cheapflights users on 1/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Thu 6/47:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 1/20![Icelandair logo]()
$511
This The Travel House deal was found by Cheapflights users on 1/20. 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.
Wed 2/116:00 am
LHR
- SEA
2 stops23h 12m
SWISS
Wed 2/187:00 am
SEA
- LHR
1 stop16h 55m
SWISS
Deal found 1/20![SWISS logo]()
$511
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 January 21, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $502 |
One-way from | $372 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $644 |
Good round-trip deal | $588 or less |
Good one-way deal | $606 or less |
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 January 21, 2026.
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
LHR - SEA
LHRSEA
London Heathrow
Mon 2/16
6:30 am-11:40 am
1 stop13h 10m
Seattle/Tacoma Intl
Mon 2/23
4:55 pm-10:30 am
Nonstop9h 35m
$516
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 2/2
6:30 am-12:10 pm
1 stop13h 40m
Seattle/Tacoma Intl
Mon 2/16
9:00 am-9:40 am
1 stop16h 40m
$516
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 1/27
6:30 am-11:50 am
1 stop13h 20m
Seattle/Tacoma Intl
Thu 2/5
4:55 pm-10:30 am
Nonstop9h 35m
$516
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 1/28
6:30 am-11:50 am
1 stop13h 20m
Seattle/Tacoma Intl
Tue 2/24
4:55 pm-10:30 am
Nonstop9h 35m
$517
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 3/10
6:30 am-12:35 pm
1 stop13h 05m
Seattle/Tacoma Intl
Tue 3/17
7:25 pm-11:55 am
Nonstop9h 30m
$517
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 2/2
6:30 am-11:40 am
1 stop13h 10m
Seattle/Tacoma Intl
Mon 2/16
6:25 pm-11:55 am
Nonstop9h 30m
$517
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 2/2
6:30 am-11:40 am
1 stop13h 10m
Seattle/Tacoma Intl
Tue 2/17
6:25 pm-11:55 am
Nonstop9h 30m
$517
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 1/28
6:30 am-11:50 am
1 stop13h 20m
Seattle/Tacoma Intl
Wed 2/25
2:00 pm-8:10 pm
1 stop22h 10m
$521
LondonSeattle
LCY - SEA
LCYSEA
London City
Wed 2/18
9:20 am-11:30 pm
2 stops22h 10m
Seattle/Tacoma Intl
Wed 2/25
12:32 pm-5:05 pm
2 stops20h 33m
$536
LondonSeattle
LCY - SEA
LCYSEA
London City
Fri 2/6
9:20 am-10:43 pm
2 stops21h 23m
Seattle/Tacoma Intl
Mon 2/9
12:35 pm-5:05 pm
2 stops20h 30m
$536
Showing 1-10 of 60 results
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 $407). 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 January 21, 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 January 21, 2026.
The most flights from GB0 to SEA are scheduled on a Tuesday (17 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 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 4% 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 January 21, 2026.
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.
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
Browse thousands of different options on Cheapflights for your next trip
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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.
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 January 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$467 | Average$833 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$551 | Average$876 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$574 | Average$772 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$575 | Average$864 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$589 | Average$854 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$780 | Average$780 | FlexibilityNo cancel fee | On-time77% |