Cheap Flights from London (LHR) to Seattle (SEA) from HK$3,683~

View HK$3,683 flight on Wed, 28 Jan 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Seattle

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Find Cheap Flights from London (LHR) to Seattle (SEA)

Prices were available within the past 7 days and start at HK$3,683 for one-way flights and HK$4,069 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,069 Return, found 1 day ago
HK$4,069
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,069 found 1 day ago
United
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,289 Return, found 1 day ago
HK$4,289
Return
found 1 day ago
Select United flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,289 found 1 day ago
Air Canada
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,289 Return, found 1 day ago
HK$4,289
Return
found 1 day ago
Select Air Canada flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,289 found 1 day ago
Virgin Atlantic
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,335 Return, found 1 day ago
HK$4,335
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,335 found 1 day ago
Lufthansa
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,365 Return, found 1 day ago
HK$4,365
Return
found 1 day ago
Select Lufthansa flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,365 found 1 day ago
Virgin Atlantic
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,385 Return, found 1 day ago
HK$4,385
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,385 found 1 day ago
Lufthansa
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,409 Return, found 1 day ago
HK$4,409
Return
found 1 day ago
Select Lufthansa flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,409 found 1 day ago
Delta
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,420 Return, found 1 day ago
HK$4,420
Return
found 1 day ago
Select Delta flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,420 found 1 day ago
Virgin Atlantic
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,454 Return, found 1 day ago
HK$4,454
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,454 found 1 day ago
Austrian Airlines
Sun, 1 Feb - Sun, 8 Feb
LHR
London
SEA
Seattle
HK$4,485 Return, found 1 day ago
HK$4,485
Return
found 1 day ago
Select Austrian Airlines flight, departing Sun, 1 Feb from London to Seattle, returning Sun, 8 Feb, priced at HK$4,485 found 1 day ago

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

February is typically the cheapest month to fly

From HK$3,781 - HK$7,115 per traveller.
London to Seattle route information
Origin airport
Heathrow
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, Lufthansa, Singapore Airlines, Turkish Airlines, United, Virgin Atlantic
Return price
HK$4,069
Distance
7657 km
Average flight time
2 hours 12 mins

Flights from London to Seattle

Book cheap flights from London (LHR) to Seattle (SEA) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from London (LHR) to Seattle (SEA) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be 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 London (LHR) to Seattle (SEA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Seattle flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Seattle and things to do in Seattle for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Seattle more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is HK$3,683 now!

 

Frequently asked questions

How much is a flight from Heathrow Airport to Sea-Tac Airport?
Start packing your bags, because round-trip journeys from LHR to Seattle - Tacoma Intl. Airport (SEA) start from HK$4,069. That's based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book now to secure the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Heathrow Airport (LHR) to Sea-Tac Airport?
Most flights can be canceled online, but whether you incur a fee depends on your airline. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Heathrow Airport to SEA 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 Heathrow to Sea-Tac Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to Seattle - Tacoma Intl. Airport (SEA)?
With around 7,700 kilometers separating LHR and Seattle - Tacoma Intl. Airport (SEA), your flight will be a long one. Pack wisely to make your time on board more comfortable. Little things like an extra pair of socks and a good neck pillow can make a big difference.
Which airlines fly direct from Heathrow Airport to Sea-Tac Airport?
Getting from London Heathrow to Sea-Tac Airport is easy when you have a good range of airlines to choose from. Here are a few of the best:

  • 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 Heathrow Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes score a bargain, with some of the cheapest airfares from London Heathrow to SEA surfacing a few weeks before the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines advertise prices that far in advance.

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