NZ$436 Cheap Flights Seattle to London (SEA-LON)

View NZ$436 flight on Wed, 15 Oct. 2025Opens in a new window

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Fri., 5 Sep. - Fri., 19 Sep.
SEA
Seattle
LHR
London
NZ$1,078 Return, found 3 days ago
NZ$1,078
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Fri., 5 Sep. from Seattle to London, returning Fri., 19 Sep., priced at NZ$1,078 found 3 days ago
Icelandair
Fri., 5 Sep. - Fri., 19 Sep.
SEA
Seattle
LGW
London
NZ$1,083 Return, found 3 days ago
NZ$1,083
Return
found 3 days ago
Select Icelandair flight, departing Fri., 5 Sep. from Seattle to London, returning Fri., 19 Sep., priced at NZ$1,083 found 3 days ago
Aer Lingus
Sun., 10 Aug. - Wed., 20 Aug.
SEA
Seattle
LHR
London
NZ$1,115 Return, found 2 days ago
NZ$1,115
Return
found 2 days ago
Select Aer Lingus flight, departing Sun., 10 Aug. from Seattle to London, returning Wed., 20 Aug., priced at NZ$1,115 found 2 days ago
Delta
Mon., 11 Aug. - Thu., 4 Sep.
SEA
Seattle
LHR
London
NZ$1,159 Return, found 6 days ago
NZ$1,159
Return
found 6 days ago
Select Delta flight, departing Mon., 11 Aug. from Seattle to London, returning Thu., 4 Sep., priced at NZ$1,159 found 6 days ago
United
Mon., 11 Aug. - Thu., 4 Sep.
SEA
Seattle
LHR
London
NZ$1,161 Return, found 6 days ago
NZ$1,161
Return
found 6 days ago
Select United flight, departing Mon., 11 Aug. from Seattle to London, returning Thu., 4 Sep., priced at NZ$1,161 found 6 days ago
Virgin Atlantic
Sun., 10 Aug. - Wed., 20 Aug.
SEA
Seattle
LHR
London
NZ$1,177 Return, found 2 days ago
NZ$1,177
Return
found 2 days ago
Select Virgin Atlantic flight, departing Sun., 10 Aug. from Seattle to London, returning Wed., 20 Aug., priced at NZ$1,177 found 2 days ago
Air Canada
Sun., 10 Aug. - Wed., 20 Aug.
SEA
Seattle
LHR
London
NZ$1,177 Return, found 2 days ago
NZ$1,177
Return
found 2 days ago
Select Air Canada flight, departing Sun., 10 Aug. from Seattle to London, returning Wed., 20 Aug., priced at NZ$1,177 found 2 days ago
British Airways
Mon., 11 Aug. - Thu., 4 Sep.
SEA
Seattle
LHR
London
NZ$1,229 Return, found 6 days ago
NZ$1,229
Return
found 6 days ago
Select British Airways flight, departing Mon., 11 Aug. from Seattle to London, returning Thu., 4 Sep., priced at NZ$1,229 found 6 days ago
Lufthansa
Mon., 11 Aug. - Thu., 4 Sep.
SEA
Seattle
LHR
London
NZ$1,236 Return, found 6 days ago
NZ$1,236
Return
found 6 days ago
Select Lufthansa flight, departing Mon., 11 Aug. from Seattle to London, returning Thu., 4 Sep., priced at NZ$1,236 found 6 days ago
Air France
Sun., 10 Aug. - Wed., 20 Aug.
SEA
Seattle
LHR
London
NZ$1,265 Return, found 2 days ago
NZ$1,265
Return
found 2 days ago
Select Air France flight, departing Sun., 10 Aug. from Seattle to London, returning Wed., 20 Aug., priced at NZ$1,265 found 2 days ago

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 NZ$1,078. 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 cancelled 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 kilometres 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.
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