£350 Cheap Flights from London (LON) to Seattle (SEA)

View £350 flight on Sun, 19 Apr 2026Opens in a new window

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

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Cheap Flights from London (LON) to Seattle (SEA)

Prices were available within the past 7 days and start at £350 for one-way flights and £517 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, 23 Apr - Wed, 29 Apr
LGW
London
SEA
Seattle
£517 Return, found 3 hours ago
£517
Return
found 3 hours ago
Select Icelandair flight, departing Thu, 23 Apr from London to Seattle, returning Wed, 29 Apr, priced at £517 found 3 hours ago
Icelandair
Wed, 7 Oct - Wed, 21 Oct
LHR
London
SEA
Seattle
£519 Return, found 1 day ago
£519
Return
found 1 day ago
Select Icelandair flight, departing Wed, 7 Oct from London to Seattle, returning Wed, 21 Oct, priced at £519 found 1 day ago
Delta
Thu, 9 Jul - Mon, 13 Jul
LHR
London
SEA
Seattle
£520 Return, found 10 hours ago
£520
Return
found 10 hours ago
Select Delta flight, departing Thu, 9 Jul from London to Seattle, returning Mon, 13 Jul, priced at £520 found 10 hours ago
Air France
Thu, 9 Jul - Mon, 13 Jul
LHR
London
SEA
Seattle
£537 Return, found 10 hours ago
£537
Return
found 10 hours ago
Select Air France flight, departing Thu, 9 Jul from London to Seattle, returning Mon, 13 Jul, priced at £537 found 10 hours ago
KLM
Sun, 5 Jul - Sun, 12 Jul
LHR
London
SEA
Seattle
£538 Return, found 3 hours ago
£538
Return
found 3 hours ago
Select KLM flight, departing Sun, 5 Jul from London to Seattle, returning Sun, 12 Jul, priced at £538 found 3 hours ago
Virgin Atlantic
Sun, 5 Jul - Sun, 12 Jul
LHR
London
SEA
Seattle
£538 Return, found 3 hours ago
£538
Return
found 3 hours ago
Select Virgin Atlantic flight, departing Sun, 5 Jul from London to Seattle, returning Sun, 12 Jul, priced at £538 found 3 hours ago
KLM
Thu, 9 Jul - Mon, 13 Jul
LCY
London
SEA
Seattle
£549 Return, found 10 hours ago
£549
Return
found 10 hours ago
Select KLM flight, departing Thu, 9 Jul from London to Seattle, returning Mon, 13 Jul, priced at £549 found 10 hours ago
Scandinavian Airlines
Fri, 29 May - Sun, 31 May
LHR
London
SEA
Seattle
£556 Return, found 1 day ago
£556
Return
found 1 day ago
Select Scandinavian Airlines flight, departing Fri, 29 May from London to Seattle, returning Sun, 31 May, priced at £556 found 1 day ago
Condor
Fri, 24 Apr - Mon, 27 Apr
LGW
London
SEA
Seattle
£557 Return, found 1 day ago
£557
Return
found 1 day ago
Select Condor flight, departing Fri, 24 Apr from London to Seattle, returning Mon, 27 Apr, priced at £557 found 1 day ago
American Airlines
Wed, 17 Jun - Wed, 8 Jul
LHR
London
SEA
Seattle
£560 Return, just found
£560
Return
just found
Select American Airlines flight, departing Wed, 17 Jun from London to Seattle, returning Wed, 8 Jul, priced at £560 just found

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from £525
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from £525

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 £517. 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.

Travel information

Origin airport
Gatwick
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, Austrian Airlines, British Airways, Brussels Airlines, Condor, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, Virgin Atlantic, WestJet
Return price
£516
Distance
7697 km

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