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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
22 Sep — 29 Sep1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Seattle/Tacoma Intl are usually found in February or January, booked 83 days in advance, depart on a Thursday or Wednesday and return on a Tuesday
Cheap flight deals from London to Seattle
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Cheapest flights from London to Seattle
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.
Tue 1/913:00 -
1 stop15h 40m
Tue 8/919:00 -
1 stop11h 40m
Deal found 18/8£476
Tue 8/921:25 -
1 stop22h 20m
Tue 15/919:00 -
1 stop17h 20m
Deal found 18/8£476
Tue 8/915:40 -
1 stop28h 05m
Tue 15/919:00 -
1 stop11h 40m
Deal found 18/8£476
Tue 1/921:25 -
1 stop22h 20m
Tue 8/915:40 -
1 stop20h 40m
Deal found 18/8£476
Sat 3/1007:25 -
1 stop17h 34m
Thu 8/1019:15 -
1 stop34h 05m
Deal found 18/8£478
Sat 24/1006:30 -
1 stop13h 50m
Sat 31/1008:40 -
1 stop20h 10m
Deal found 18/8£478
Fri 4/921:25 -
1 stop22h 20m
Tue 8/919:00 -
1 stop17h 20m
Deal found 19/8£480
Fri 4/915:40 -
1 stop28h 05m
Tue 8/919:00 -
1 stop11h 40m
Deal found 19/8£481
Tue 1/921:25 -
1 stop22h 20m
Thu 1/1019:00 -
1 stop32h 55m
Deal found 21/8£481
Mon 21/921:25 -
1 stop28h 30m
Mon 28/915:40 -
1 stop12h 15m
Deal found 19/8£481
Sat 17/1018:40 -
3 stops34h 00m
Sun 25/1019:10 -
3 stops30h 25m
Deal found 19/8£482
Wed 14/1013:05 -
1 stop12h 50m
Tue 20/1019:00 -
1 stop32h 55m
Deal found 20/8£482
Best flights from London to Seattle
Discover carefully curated flight deals from London to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.
Wed 30/913:05 -
1 stop12h 50m
Thu 29/1015:35 -
1 stop12h 15m
Deal found 19/8£503
Thu 8/1009:25 -
2 stops17h 07m
Thu 22/1007:00 -
2 stops17h 25m
Deal found 18/8£521
Tue 6/1007:25 -
2 stops19h 27m
Tue 13/1010:42 -
2 stops15h 58m
Deal found 22/8£533
Fri 2/1012:50 -
3 stops32h 55m
Fri 9/1015:55 -
3 stops24h 35m
Deal found 17/8£533
Mon 7/1214:55 -
Nonstop9h 55m
Mon 14/1212:47 -
1 stop15h 13m
Deal found 20/8£550
Sat 26/1212:20 -
Nonstop10h 30m
Tue 5/116:55 -
Nonstop9h 45m
Deal found 20/8£555
Tue 6/1017:00 -
Nonstop10h 00m
Tue 13/1021:40 -
Nonstop9h 25m
Deal found 22/8£559
Tue 20/1010:35 -
1 stop15h 12m
Thu 29/1017:05 -
1 stop15h 40m
Deal found 19/8£569
Wed 7/1009:20 -
1 stop15h 15m
Wed 14/1013:45 -
1 stop11h 45m
Deal found 22/8£594
Wed 30/910:20 -
1 stop13h 20m
Sun 11/1017:40 -
1 stop17h 10m
Deal found 19/8£611
Thu 8/1017:35 -
2 stops37h 21m
Wed 21/1010:42 -
2 stops39h 13m
Deal found 19/8£717
Thu 1/1015:40 -
1 stop13h 00m
Thu 29/1015:35 -
1 stop12h 20m
Deal found 19/8£520
Thu 8/1009:25 -
2 stops17h 07m
Wed 21/1007:00 -
2 stops17h 25m
Deal found 22/8£524
Fri 18/906:50 -
2 stops19h 51m
Sat 26/915:55 -
1 stop12h 30m
Deal found 21/8£534
Wed 7/1006:20 -
2 stops19h 35m
Wed 14/1015:40 -
2 stops23h 15m
Deal found 22/8£549
Tue 27/1009:25 -
Nonstop10h 00m
Sun 8/1118:45 -
Nonstop9h 25m
Deal found 22/8£552
Thu 8/1009:55 -
1 stop14h 40m
Wed 21/1017:30 -
Nonstop9h 50m
Deal found 18/8£561
Thu 14/112:15 -
1 stop12h 45m
Mon 18/114:35 -
1 stop12h 15m
Deal found 19/8£527
Tue 20/1020:15 -
1 stop23h 37m
Thu 29/1006:00 -
2 stops19h 10m
Deal found 19/8£582
Thu 8/1009:15 -
2 stops17h 17m
Wed 21/1007:00 -
2 stops21h 35m
Deal found 22/8£540
Thu 8/1011:25 -
2 stops20h 01m
Wed 21/1008:30 -
1 stop20h 05m
Deal found 18/8£555
Thu 3/910:20 -
1 stop13h 40m
Wed 16/917:40 -
1 stop17h 05m
Deal found 18/8£612
Wed 14/1009:50 -
Nonstop9h 45m
Sun 18/1020:20 -
Nonstop9h 25m
Deal found 17/8£566
Sun 27/1210:00 -
1 stop13h 13m
Fri 8/115:25 -
1 stop16h 20m
Deal found 20/8£569
Tue 15/909:40 -
1 stop15h 30m
Sun 27/919:10 -
1 stop12h 15m
Deal found 20/8£578
Wed 7/1010:25 -
2 stops19h 38m
Wed 14/1018:40 -
1 stop13h 20m
Deal found 22/8£586
Wed 7/1009:15 -
2 stops17h 17m
Wed 14/1007:00 -
2 stops21h 35m
Deal found 22/8£540
Mon 28/1210:00 -
1 stop13h 13m
Wed 6/115:25 -
1 stop16h 20m
Deal found 21/8£570
Thu 8/1008:25 -
1 stop16h 10m
Thu 22/1006:00 -
2 stops19h 30m
Deal found 18/8£589
Mon 2/1119:05 -
2 stops36h 12m
Wed 2/1213:16 -
2 stops19h 49m
Deal found 18/8£540
Direct flights from London to Seattle
Explore direct flight options from London to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 23 August 2026.
Fri 6/1112:20 -
Nonstop10h 30m
Sun 22/1116:50 -
Nonstop9h 50m
Deal found 22/8£514
Thu 22/1017:00 -
Nonstop10h 00m
Mon 26/1019:40 -
Nonstop9h 40m
Deal found 19/8£518
Tue 6/1017:00 -
Nonstop10h 00m
Wed 21/1021:40 -
Nonstop9h 25m
Deal found 19/8£519
Tue 20/1017:00 -
Nonstop10h 00m
Tue 27/1019:40 -
Nonstop9h 40m
Deal found 20/8£520
Mon 28/917:00 -
Nonstop10h 00m
Wed 28/1019:40 -
Nonstop9h 40m
Deal found 20/8£520
Wed 21/1017:00 -
Nonstop10h 00m
Thu 5/1118:55 -
Nonstop9h 25m
Deal found 21/8£521
Thu 5/1114:45 -
Nonstop10h 05m
Sun 15/1118:55 -
Nonstop9h 25m
Deal found 19/8£525
Tue 29/917:00 -
Nonstop10h 00m
Wed 7/1021:40 -
Nonstop9h 25m
Deal found 19/8£528
Thu 1/1017:00 -
Nonstop10h 00m
Mon 19/1021:40 -
Nonstop9h 25m
Deal found 20/8£530
Wed 4/1114:45 -
Nonstop10h 05m
Sun 15/1118:55 -
Nonstop9h 25m
Deal found 22/8£531
Mon 5/1009:50 -
Nonstop9h 45m
Mon 12/1020:20 -
Nonstop9h 25m
Deal found 21/8£531
Last-minute flights from London to Seattle
Discover last-minute flight deals from London to Seattle. Data last updated 23 August 2026 and is based on user searches.
Mon 31/821:25 -
1 stop22h 20m
Thu 24/919:00 -
1 stop32h 55m
Deal found 18/8£486
Tue 1/913:00 -
1 stop15h 40m
Tue 8/919:00 -
1 stop11h 40m
Deal found 18/8£476
Tue 1/921:25 -
1 stop22h 20m
Tue 8/915:40 -
1 stop20h 40m
Deal found 18/8£476
Tue 1/921:25 -
1 stop22h 20m
Thu 1/1019:00 -
1 stop32h 55m
Deal found 21/8£481
Fri 4/921:25 -
1 stop22h 20m
Tue 8/919:00 -
1 stop17h 20m
Deal found 19/8£480
Fri 4/915:40 -
1 stop28h 05m
Tue 8/919:00 -
1 stop11h 40m
Deal found 19/8£481
Tue 8/921:25 -
1 stop22h 20m
Tue 15/919:00 -
1 stop17h 20m
Deal found 18/8£476
Tue 8/915:40 -
1 stop28h 05m
Tue 15/919:00 -
1 stop11h 40m
Deal found 18/8£476
Tue 8/921:25 -
1 stop22h 20m
Tue 29/919:00 -
1 stop17h 20m
Deal found 19/8£484
Tue 15/910:50 -
1 stop14h 09m
Tue 6/1008:00 -
1 stop19h 50m
Deal found 18/8£484
Sun 20/906:30 -
1 stop13h 25m
Tue 20/1015:00 -
1 stop14h 20m
Deal found 18/8£478
Mon 21/921:25 -
1 stop28h 30m
Mon 28/915:40 -
1 stop12h 15m
Deal found 19/8£481
One-way flights from London to Seattle
Search for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.
Mon 15/209:00 -
2 stops22h 21m
Deal found 19/8£380
Mon 28/913:00 -
3 stops37h 36m
Deal found 20/8£380
Thu 8/1017:15 -
3 stops49h 00m
Deal found 19/8£380
Thu 18/214:55 -
Nonstop9h 55m
Deal found 19/8£380
Thu 15/1006:10 -
2 stops22h 05m
Deal found 19/8£381
Sun 1/1119:05 -
2 stops33h 42m
Deal found 19/8£382
Wed 21/1006:45 -
2 stops24h 14m
Deal found 18/8£382
Tue 8/909:40 -
2 stops41h 05m
Deal found 18/8£382
Mon 7/1219:05 -
2 stops33h 43m
Deal found 20/8£382
Wed 16/916:50 -
3 stops48h 50m
Deal found 20/8£382
Mon 14/919:50 -
3 stops45h 50m
Deal found 18/8£382
Mon 26/1012:15 -
3 stops37h 39m
Deal found 22/8£382
Find flight deals from London to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 23 August 2026.
Customise your flight search to find flights from London 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 7,457,451 searches. Data last updated 23 August 2026.
Use the filters below to find and compare flights from London to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Wed 30/9
13:05-17:55
1 stop12h 50m
Seattle/Tacoma Intl
Thu 29/10
15:35-10:50
1 stop12h 15m
£503
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Thu 1/10
15:40-20:40
1 stop13h 00m
Seattle/Tacoma Intl
Thu 29/10
15:35-10:55
1 stop12h 20m
£520
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Thu 8/10
09:25-18:32
2 stops17h 07m
Seattle/Tacoma Intl
Thu 22/10
07:00-08:25
2 stops17h 25m
£521
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Thu 8/10
09:25-18:32
2 stops17h 07m
Seattle/Tacoma Intl
Wed 21/10
07:00-08:25
2 stops17h 25m
£524
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Thu 14/1
12:15-17:00
1 stop12h 45m
Seattle/Tacoma Intl
Mon 18/1
14:35-10:50
1 stop12h 15m
£527
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Tue 6/10
07:25-18:52
2 stops19h 27m
Seattle/Tacoma Intl
Tue 13/10
10:42-10:40
2 stops15h 58m
£533
LondonSeattle
LTN London Luton - SEA Seattle/Tacoma Intl
LTNSEA
London Luton
Fri 2/10
12:50-13:45
3 stops32h 55m
Seattle/Tacoma Intl
Fri 9/10
15:55-00:30
3 stops24h 35m
£533
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Fri 18/9
06:50-18:41
2 stops19h 51m
Seattle/Tacoma Intl
Sat 26/9
15:55-12:25
1 stop12h 30m
£534
LondonSeattle
LCY London City - SEA Seattle/Tacoma Intl
LCYSEA
London City
Thu 8/10
09:15-18:32
2 stops17h 17m
Seattle/Tacoma Intl
Wed 21/10
07:00-12:35
2 stops21h 35m
£540
LondonSeattle
LCY London City - SEA Seattle/Tacoma Intl
LCYSEA
London City
Wed 7/10
09:15-18:32
2 stops17h 17m
Seattle/Tacoma Intl
Wed 14/10
07:00-12:35
2 stops21h 35m
£540
Flights are sorted by cheapest return flights first.
Deals found on 19/8
Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6
Best time to book a flight from London to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.
LON-SEA
LHR-SEA
LGW-SEA
LTN-SEA
LCY-SEA
Estimated return 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 London to Seattle
LON-SEA
LHR-SEA
LGW-SEA
LTN-SEA
LCY-SEA
What is the cheapest month to book a flight from London to Seattle?
Currently, February is the cheapest month in which you can book a flight from London to Seattle (average of £477). Flying from London to Seattle in December is currently the most expensive (average of £635). 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 LON to SEA?
Find hourly flight availability from London 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 23 August 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Seattle as you normally would.
Weekly flight availability from London to Seattle
Explore weekly flight availability from London 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 23 August 2026.
The most flights from LON to SEA are scheduled on a Tuesday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).
How much does it cost for a return flight from London to Seattle?
Airfare is below average for this route at the moment.
London to Seattle flights typically cost between £504 and £670 in September.The cheapest return price found within the last 5 days was £476 on Icelandair (8 Sept–15 Sept).
What’s the top stopover airport for flights from London to Seattle?
Share of one-stop return flights from London to Seattle chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 77% of one-stop itineraries from London to Seattle on Cheapflights.
What’s the cheapest stopover airport for flights from London to Seattle?
Average return fare for one-stop flights from London to Seattle, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £446.
What’s the fastest stopover option from London to Seattle?
Shortest average travel time for one-stop one-way flights from London to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Vancouver (YVR) have the shortest average one-way travel time for one-stop routes: 12h 26m.
Which airport typically offers the quickest stopover for flights from London to Seattle?
Average stopover duration for one-stop one-way flights from London to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Helsinki (HEL) offer the fastest connection on this route, with an average stopover time of 1h 03m.
How often are flights from London to Seattle delayed?
About 11% of weekly flights between London and Seattle have experienced delays in the past year, with the average delay time being 130 minutes.
What is the most punctual flight time for London 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 Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Seattle flights?
Over the past year, Delta have had the lowest number of delays on this route, with just 5% of flights being delayed.
How far ahead should I book a flight from London to Seattle?
Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 23 August 2026.
Read reviews from past customers who have flown with Alaska Airlines,KLM, andVirgin Atlantic
from London to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Related info for your journey
Find useful and relevant information for your journey from London 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 London?
Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 22 daily inbound flights from London from 12 different airlines.
How long is the flight from London to Seattle?
A quick flight from London to Seattle can take about 12h 50m. Icelandair provides one of the quickest options available for as low as £503. There are 4783 mi between London and Seattle. This flight may include one or multiple stops.
What are the cheapest airlines flying from London to Seattle round-trip?
Lufthansa, at £329, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include Icelandair and Aer Lingus. Lufthansa is priced at 40% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from London to Seattle one-way?
£330 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Icelandair and Virgin Atlantic, with prices starting from £333 and £360, respectively.
What are the most popular routes from London to Seattle?
When deciding which route to take from London to Seattle consider London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London Stansted - Seattle/Tacoma Intl as they are the most popular.
What are the most reliable airlines from London to Seattle?
Consider Scandinavian Airlines (82%), American Airlines (75%) or KLM (75%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.
What are the cheapest flights from London to Seattle?
On average you can expect to pay £1,412 for a flight from London to Seattle. The cheapest flight overall is £311 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £423.
Can I find deals for business class flights from London to Seattle?
Yes. Cheapflights offers flight deals from London 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 London to Seattle?
Currently, February is the cheapest month in which you can book a flight from London to Seattle (average of £477). Flying from London to Seattle in December is currently the most expensive (average of £635). 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.
Book flights to Seattle if you plan to visit one of these locations
Federal Way
SeaTac
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Fly from London to Seattle on these airlines
Choose from the following airlines for your flight from London to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 23 August 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 23 August 2026.
Discover the top 10 airlines that operate flights from London 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 7,457,451 searches. Data last updated 23 August 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from London to Seattle?
Cheapflights makes it easy to find London to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from London to Seattle?
Millions of users choose and trust Cheapflights to book the best flight deals from London to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from London to Seattle with no change fees?
Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from London to Seattle become cheaper?
Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
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