Cheap Flights from Seattle (SEA) to London (LON) from HK$2,003~

View HK$2,003 flight on Tue, 24 Mar 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to London

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 35% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at HK$2,003 for one-way flights and HK$4,895 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 29 Mar - Wed, 8 Apr
SEA
Seattle
LHR
London
HK$4,895 Return, found 3 days ago
HK$4,895
Return
found 3 days ago
Select United flight, departing Sun, 29 Mar from Seattle to London, returning Wed, 8 Apr, priced at HK$4,895 found 3 days ago
Virgin Atlantic
Mon, 26 Jan - Mon, 2 Feb
SEA
Seattle
LHR
London
HK$4,931 Return, found 4 days ago
HK$4,931
Return
found 4 days ago
Select Virgin Atlantic flight, departing Mon, 26 Jan from Seattle to London, returning Mon, 2 Feb, priced at HK$4,931 found 4 days ago
Virgin Atlantic
Mon, 26 Jan - Mon, 2 Feb
SEA
Seattle
LHR
London
HK$4,938 Return, found 4 days ago
HK$4,938
Return
found 4 days ago
Select Virgin Atlantic flight, departing Mon, 26 Jan from Seattle to London, returning Mon, 2 Feb, priced at HK$4,938 found 4 days ago
Delta
Mon, 26 Jan - Mon, 2 Feb
SEA
Seattle
LHR
London
HK$4,938 Return, found 4 days ago
HK$4,938
Return
found 4 days ago
Select Delta flight, departing Mon, 26 Jan from Seattle to London, returning Mon, 2 Feb, priced at HK$4,938 found 4 days ago
Air Canada
Sun, 29 Mar - Wed, 8 Apr
SEA
Seattle
LHR
London
HK$4,946 Return, found 3 days ago
HK$4,946
Return
found 3 days ago
Select Air Canada flight, departing Sun, 29 Mar from Seattle to London, returning Wed, 8 Apr, priced at HK$4,946 found 3 days ago
Delta
Mon, 26 Jan - Mon, 2 Feb
SEA
Seattle
LHR
London
HK$4,950 Return, found 4 days ago
HK$4,950
Return
found 4 days ago
Select Delta flight, departing Mon, 26 Jan from Seattle to London, returning Mon, 2 Feb, priced at HK$4,950 found 4 days ago
Delta
Mon, 26 Jan - Mon, 2 Feb
SEA
Seattle
LHR
London
HK$4,973 Return, found 4 days ago
HK$4,973
Return
found 4 days ago
Select Delta flight, departing Mon, 26 Jan from Seattle to London, returning Mon, 2 Feb, priced at HK$4,973 found 4 days ago
United
Sun, 29 Mar - Wed, 8 Apr
SEA
Seattle
LHR
London
HK$4,982 Return, found 3 days ago
HK$4,982
Return
found 3 days ago
Select United flight, departing Sun, 29 Mar from Seattle to London, returning Wed, 8 Apr, priced at HK$4,982 found 3 days ago
Lufthansa
Sun, 29 Mar - Wed, 8 Apr
SEA
Seattle
LHR
London
HK$5,043 Return, found 3 days ago
HK$5,043
Return
found 3 days ago
Select Lufthansa flight, departing Sun, 29 Mar from Seattle to London, returning Wed, 8 Apr, priced at HK$5,043 found 3 days ago
Virgin Atlantic
Sun, 29 Mar - Wed, 8 Apr
SEA
Seattle
LHR
London
HK$5,120 Return, found 3 days ago
HK$5,120
Return
found 3 days ago
Select Virgin Atlantic flight, departing Sun, 29 Mar from Seattle to London, returning Wed, 8 Apr, priced at HK$5,120 found 3 days ago

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

October is typically the cheapest month to fly

From HK$3,723 - HK$8,398 per traveller.
Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Return price
HK$4,895
Distance
7657 km

Flights from Seattle to England

Book cheap flights from Seattle (SEA) to England (LON) 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 Seattle (SEA) to England (LON) 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 Seattle (SEA) to England (LON) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

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

If you would like to book flights to England more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to England is HK$2,003 now!

 

Frequently asked questions

How much is a flight from Sea-Tac Airport to London (LON-All Airports)?
Round-trip journeys from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports) start from HK$4,895. This is based on fares offered within the last 7 days on Expedia for flights departing within the next year — book now so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to London (LON-All Airports)?
Most flights can be canceled online, but each air carrier has its own terms and conditions. If you do decide to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from SEA to London (LON-All Airports) 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 SEA to London (LON-All Airports) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports)?
Make the 14 hours and 48 minutes between SEA and London (LON-All Airports) as comfortable as you can. Bring the essentials, like a water bottle, toothbrush and toiletries, and simply enjoy the flight!
How far is the flight from SEA to London (LON-All Airports)?
With around 7,700 kilometers separating SEA and London (LON-All Airports), your flight will be a long one. Pack wisely and make your time on board comfortable. Simple things like an eye mask and a good travel pillow can make a massive difference.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to London (LON-All Airports)?
You have lots of options when flying from SEA to London (LON-All Airports). Lock in your fare with one of these popular airlines:

  • 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 Sea-Tac Airport to London (LON-All Airports) flight tickets cheaper when they're purchased at the last minute?
Booking last minute from SEA to London (LON-All Airports) can be hit-or-miss. It is possible to score a bargain, but you could also miss out entirely! If you'd prefer to play it safe and start planning early on, Expedia compares flight deals up to 12 months in advance. Just remember that not all airlines publish their prices that far in advance. Our suggestion? Check back often as updates are made regularly.

Explore a world of travel with Expedia

*Available to Expedia members.