€440 Cheap Flights London to Seattle (LON-SEA)

View €440 flight on Mon, 3 Nov 2025Opens in a new window

Popular airlines from London to Seattle, WA (SEA-Seattle - Tacoma Intl.)

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Cheap flights from London to Seattle (LON-SEA)

Prices were available within the past 7 days and start at €440 for one-way flights and €470 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, 8 Sep - Mon, 22 Sep
LHR
London
SEA
Seattle
€470 Return, found 1 day ago
€470
Return
found 1 day ago
Select Aer Lingus flight, departing Mon, 8 Sep from London to Seattle, returning Mon, 22 Sep, priced at €470 found 1 day ago
Icelandair
Mon, 6 Oct - Thu, 9 Oct
LGW
London
SEA
Seattle
€496 Return, found 3 days ago
€496
Return
found 3 days ago
Select Icelandair flight, departing Mon, 6 Oct from London to Seattle, returning Thu, 9 Oct, priced at €496 found 3 days ago
British Airways
Mon, 6 Oct - Mon, 20 Oct
LHR
London
SEA
Seattle
€582 Return, found 3 days ago
€582
Return
found 3 days ago
Select British Airways flight, departing Mon, 6 Oct from London to Seattle, returning Mon, 20 Oct, priced at €582 found 3 days ago
Delta
Mon, 8 Sep - Mon, 22 Sep
LHR
London
SEA
Seattle
€583 Return, found 1 day ago
€583
Return
found 1 day ago
Select Delta flight, departing Mon, 8 Sep from London to Seattle, returning Mon, 22 Sep, priced at €583 found 1 day ago
Virgin Atlantic
Mon, 8 Sep - Mon, 22 Sep
LHR
London
SEA
Seattle
€583 Return, found 1 day ago
€583
Return
found 1 day ago
Select Virgin Atlantic flight, departing Mon, 8 Sep from London to Seattle, returning Mon, 22 Sep, priced at €583 found 1 day ago
Brussels Airlines
Mon, 1 Sep - Thu, 11 Sep
LHR
London
SEA
Seattle
€583 Return, found 3 days ago
€583
Return
found 3 days ago
Select Brussels Airlines flight, departing Mon, 1 Sep from London to Seattle, returning Thu, 11 Sep, priced at €583 found 3 days ago
Austrian Airlines
Mon, 1 Sep - Thu, 11 Sep
LHR
London
SEA
Seattle
€583 Return, found 3 days ago
€583
Return
found 3 days ago
Select Austrian Airlines flight, departing Mon, 1 Sep from London to Seattle, returning Thu, 11 Sep, priced at €583 found 3 days ago
Iberia
Mon, 8 Sep - Mon, 22 Sep
LHR
London
SEA
Seattle
€587 Return, found 1 day ago
€587
Return
found 1 day ago
Select Iberia flight, departing Mon, 8 Sep from London to Seattle, returning Mon, 22 Sep, priced at €587 found 1 day ago
American Airlines
Mon, 8 Sep - Mon, 22 Sep
LHR
London
SEA
Seattle
€587 Return, found 1 day ago
€587
Return
found 1 day ago
Select American Airlines flight, departing Mon, 8 Sep from London to Seattle, returning Mon, 22 Sep, priced at €587 found 1 day ago
United
Mon, 1 Sep - Thu, 11 Sep
LHR
London
SEA
Seattle
€597 Return, found 3 days ago
€597
Return
found 3 days ago
Select United flight, departing Mon, 1 Sep from London to Seattle, returning Thu, 11 Sep, priced at €597 found 3 days ago

Find the cheapest month to fly from London (LON) to Seattle (SEA)

February is typically the cheapest month to fly

From €368 - €791 per traveller.

Graph displaying average flight prices per month

London to Seattle route information
Origin airport
Heathrow
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Return price
€469
Distance
7657 km

England to Seattle Flights

When looking for plane tickets from England to Seattle, the ease and convenience of using Expedia simply can’t be beat. With tons of departure points and flights options from the top airline carriers, Expedia gives you the widest array of cheap flights to Seattle. Look for LON to SEA airfare with the assurance that you have the largest online travel agency working for you.

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Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your England to Seattle trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Seattle flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from England to Seattle with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from London (LON-All Airports) to Sea-Tac Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from London (LON-All Airports) to Sea-Tac Airport was €470. Cheap tickets don't wait forever, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from London (LON-All Airports) to Seattle - Tacoma Intl. Airport (SEA)?
This can vary between airlines, as each has its own terms and conditions. Visit the Customer Service Portal, where you'll find easy-to-follow instructions on how to cancel your flight online.
How do I find cheap flights from London (LON-All Airports) to Sea-Tac Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for London (LON-All Airports) to SEA flights, you'll see a "no change fees" filter for you to select.
How far is the flight from London (LON-All Airports) to Sea-Tac Airport?
The distance is around 7,700 kilometres, so fill your carry-on bag with all you need to make your journey comfortable. Not sure what to take on board your England to SeaTac flight? A travel pillow, earplugs and a sleep mask are a few essentials.
Which airlines fly direct from London (LON-All Airports) to SEA?
Whether you're after a one-way or return flight, you'll have your choice of airlines that will take you straight from London (LON-All Airports) to Sea-Tac Airport. These are some of the most popular ones:

  • Virgin Atlantic - (VS) with 30 monthly flights
  • American Airlines - (AA) with 30 monthly flights
  • British Airways - (BA) with 30 monthly flights
  • Delta Air Lines - (DL) with 17 monthly flights

Are London (LON-All Airports) to SEA flight tickets cheaper when they're purchased at the last minute?
Flight prices go up and down like a yo-yo, so not always. While last-minute deals between London (LON-All Airports) and Sea-Tac Airport are of course possible, it's also a good idea to keep a close eye on prices well before you fly. In fact, some carriers publish their prices up to a year before the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to book when the price is right.

Explore a world of travel with Expedia

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