LON - SEA

€278 Find Cheap Flights from London to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Seattle departing on 14/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Seattle, as well as popular online travel agencies
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Cheap Flight Deals from London to Seattle (LON-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from London to Seattle

KAYAK's recommended return flight deals from the most popular airlines that fly from London to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
United Airlines Logo
06:50 - 22:43LHR-SEA
23h 53m2 stops
United Airlines Logo
06:15 - 11:35SEA-LHR
21h 20m2 stops
€365United Airlines
Find Deal
Tue, 29 Apr - Tue, 13 May
United Airlines Logo
12:05 - 21:41LHR-SEA
17h 36m1 stop
United Airlines Logo
06:15 - 11:35SEA-LHR
21h 20m2 stops
€386United Airlines
Find Deal
Mon, 28 Apr - Tue, 13 May
Icelandair Logo
15:40 - 20:40LGW-SEA
13h 00m1 stop
Icelandair Logo
15:45 - 14:40SEA-LGW
14h 55m1 stop
€502Icelandair
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Wed, 14 May - Thu, 22 May
Icelandair Logo
13:00 - 17:50LGW-SEA
12h 50m1 stop
Icelandair Logo
15:45 - 11:45SEA-LGW
12h 00m1 stop
€508Icelandair
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Sat, 23 Aug - Sat, 6 Sep
Virgin Atlantic Logo
17:25 - 19:40LHR-SEA
10h 15mdirect
Virgin Atlantic Logo
20:20 - 14:15SEA-LHR
9h 55mdirect
€545Virgin Atlantic
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Wed, 14 May - Thu, 22 May
 Logo
15:05 - 10:58LGW-SEA
27h 53m2 stops
 Logo
22:40 - 08:10SEA-LGW
25h 30m1 stop
€560
Find Deal
Mon, 28 Apr - Tue, 13 May
British Airways Logo
09:50 - 16:59LHR-SEA
15h 09m1 stop
British Airways Logo
13:30 - 06:50SEA-LHR
9h 20mdirect
€561British Airways
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Wed, 14 May - Thu, 22 May
British Airways Logo
10:30 - 16:59LHR-SEA
14h 29m1 stop
British Airways Logo
13:30 - 06:50SEA-LHR
9h 20mdirect
€565British Airways
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Wed, 30 Apr - Wed, 7 May
 Logo
09:55 - 15:57LHR-SEA
14h 02m1 stop
 Logo
20:20 - 14:15SEA-LHR
9h 55mdirect
€570
Find Deal
Wed, 7 May - Wed, 14 May
Virgin Atlantic Logo
12:00 - 22:49LGW-SEA
18h 49m1 stop
Virgin Atlantic Logo
05:45 - 10:00SEA-LGW
20h 15m2 stops
€643Virgin Atlantic
Find Deal
Wed, 25 Jun - Wed, 23 Jul

KAYAK's insights & trends for London to Seattle flights

Get data-powered insights and trends into flights from London to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest London to Seattle flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from London to Seattle.
Our data shows that the cheapest route for a return flight from London to Seattle cost €633 and was between London Heathrow Airport (LHR) and Seattle (SEA). On average, the best prices are found if you fly this route. The average price for a return flight for this route is €633.

What is the cheapest month to fly from London to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from London to Seattle is January, where tickets cost €556 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is €907 and €892 respectively.

Can I save money by flying with a stopover from London to Seattle?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.
Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at €624 on average.

How far in advance should I book a flight from London to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from London to Seattle, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low season

January

High season

July
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (32% more expensive on average)

When to book flights from London to Seattle

Are your dates flexible? Find out the best times to travel from London to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to Seattle

  • Are there any passenger lounges at Stansted Airport?

    Those flying from London’s Stansted Airport (STN) can relax in style at the Escape Lounge. You can find this lounge in the main departure area once you have passed through security and the duty-free area. You can pre-book your entry into the lounge for £25 per person, however infants younger than 2 years can enter free of charge. The lounge is open from 4:00 – 22:30 daily.

  • How do I travel from Seattle Airport into the city?

    If you would like to use public transport to travel into the city from Seattle Airport, you can catch the Red Line of the Link Light Rail train system from the airport station to Pioneer Square Station in downtown Seattle. The trip takes about 40min. There are also a number of bus services that can take you throughout the greater Seattle area, including the 574 line to Tacoma, taking approximately 30min.

  • How do I get to Gatwick Airport?

    The fastest way to get to London’s Gatwick Airport (LGW) using public transport from Central London is to take the Gatwick Express train. You can catch this train from Victoria Station every day from 5:00 – midnight. This train runs every 15min, stopping at Gatwick Airport’s South Terminal and taking 30min. Alternatively, the Thameslink also runs to Gatwick Airport in 30min from London Bridge Station every 20min.

  • What restaurants are there at Heathrow Airport?

    If you have time before you fly from Heathrow Airport (LHR), you can enjoy a wide range of restaurants and dining options throughout the airport, depending on which terminal you are flying from. If you’re looking for a sit-down meal, you can find the Gorgeous Kitchen in Terminal 2, The Curator or The Cavier House & Prunier in Terminal 3, The Prince of Wales or Comptoir Libanais in Terminal 4 or the Crown Rivers Bar & Food at Terminal 5.

  • What is the cheapest flight from London to Seattle?

    In the last 3 days, the lowest price for a flight from London to Seattle was €316 for a one-way ticket and €415 for a return.

  • Which airlines offer Wi-Fi service onboard planes from London to Seattle?

    KLM, Delta, Air France, and Virgin Atlantic offer inflight Wi-Fi service on the London to Seattle flight route.

  • Which aircraft models fly most regularly from London to Seattle?

    The Boeing 787-10 Dreamliner is the aircraft model that flies most regularly on the London to Seattle flight route.

  • Which airline alliances offer flights from London to Seattle?

    oneworld, and SkyTeam are the airline alliances operating flights between London and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from London to Seattle?

    There are direct flights from London to Seattle on a daily basis.

  • How does KAYAK find such low prices on flights from London to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from London to Seattle

  • Seattle-Tacoma Airport (SEA) is located approximately 20min from downtown Seattle and serves nearby cities in northern Washington state, including Olympia (1h 15min away), Everett (1h 15min away) and Tacoma (45min away).
  • Before your flight from London to Seattle, you will need to register your travel plans. The UK has a visa waiver agreement with the USA and British Passport holders can apply online for the Electronic System for Travel Authorization (ESTA). This grants you entry into the USA and travel for up to 90 days.
  • If you’re not in Seattle long and would like to explore the city without all of your luggage, you can store your bags at Smarte Carte in the baggage claim area in the main terminal of Seattle Airport. Smarte Carte also has copying and postal services and travel convenience items for sale.
  • Those who are a little lost and need some help or advice on airport facilities can find airport volunteers throughout Seattle Airport. The volunteers can point the way to things like restaurants and stores but do not escort passengers to connecting flights.
  • If you’re looking for things to do at Seattle Airport after your flight from London to Seattle, you can go on an art walk through the terminal. To find out information on the individual pieces of art, you can download the STQRY app by following links to the airport website.
See more tips

Prefer to fly direct from London to Seattle/Tacoma Intl?

Find which airlines fly direct from London to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

London to Seattle/Tacoma Intl

Monday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Tuesday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Wednesday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Thursday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Friday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Saturday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Sunday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to London

Monday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Tuesday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Wednesday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Thursday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Friday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Saturday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

Sunday

British Airways, Delta, Virgin Atlantic

British Airways, Delta, +1 more

See more direct flights
See more direct flights

Everything you need to know for your flight from London to Seattle

Information on your arrival and departure airports

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