₩552,200 Cheap Flights from Seattle (SEA) to London (LON)

View ₩552,200 flight on Sat, Mar 21, 2026Opens in a new window

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

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Cheap Flights from Seattle to London (SEA-LON)

Prices were available within the past 7 days and start at ₩552,200 for one-way flights and ₩935,000 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩935,000 Roundtrip, found 3 days ago
₩935,000
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩935,000 found 3 days ago
United
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩938,500 Roundtrip, found 3 days ago
₩938,500
Roundtrip
found 3 days ago
Select United flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩938,500 found 3 days ago
Delta
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩941,800 Roundtrip, found 3 days ago
₩941,800
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩941,800 found 3 days ago
Delta
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩943,400 Roundtrip, found 3 days ago
₩943,400
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩943,400 found 3 days ago
Air Canada
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩944,800 Roundtrip, found 3 days ago
₩944,800
Roundtrip
found 3 days ago
Select Air Canada flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩944,800 found 3 days ago
Air Canada
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩947,700 Roundtrip, found 3 days ago
₩947,700
Roundtrip
found 3 days ago
Select Air Canada flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩947,700 found 3 days ago
Delta
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩950,200 Roundtrip, found 3 days ago
₩950,200
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩950,200 found 3 days ago
Air Canada
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩954,000 Roundtrip, found 3 days ago
₩954,000
Roundtrip
found 3 days ago
Select Air Canada flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩954,000 found 3 days ago
Lufthansa
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩965,300 Roundtrip, found 3 days ago
₩965,300
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩965,300 found 3 days ago
British Airways
Wed, Jan 7 - Sat, Jan 17
SEA
Seattle
LHR
London
₩1,002,600 Roundtrip, found 3 days ago
₩1,002,600
Roundtrip
found 3 days ago
Select British Airways flight, departing Wed, Jan 7 from Seattle to London, returning Sat, Jan 17, priced at ₩1,002,600 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 ₩663,642 - ₩1,376,380 per traveler.

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 ₩935,000. 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.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Roundtrip price
₩935,000
Distance
7657 km

Book with confidence

Book with confidence

Seattle to England Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Seattle to England will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring England.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with SEA to LON flights that won’t make your bank account wince. Ready to temporarily leave behind Seattle for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to LON with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Seattle to England Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

London nearby Airports

London

Seattle to Heathrow
₩935,000
*Available to Expedia members.