¥38,180 Cheap Flights from Seattle (SEA) to London (LHR)

Popular airlines from Seattle to London (LHR-Heathrow)

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Cheap Flights from Seattle to London (SEA-LHR)

Prices were available within the past 7 days and start at ¥38,180 for one-way flights and ¥84,640 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Icelandair
Icelandair
Icelandair
Icelandair
Lufthansa
American Airlines
American Airlines
British Airways
Air Canada

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

October is typically the cheapest month to fly

From ¥74,258 - ¥131,185 per traveler.

Alternative airports near London

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

Frequently asked questions

How much is a flight from Sea-Tac Airport to London Heathrow?
Start packing your suitcase, because round-trip flights from Sea-Tac Airport to London Heathrow start from ¥84,640. That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to lock in 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 Sea-Tac Airport to LHR?
We understand that circumstances change unexpectedly, so we've made it as easy as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Sea-Tac Airport to Heathrow Airport (LHR) 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-Tac Airport to Heathrow Airport (LHR) 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 Heathrow Airport (LHR)?
From Seattle - Tacoma Intl. Airport (SEA) to London Heathrow, you'll be in the sky for an average of 9 hours and 24 minutes. If you've been looking forward to finishing that bestselling novel, now's a good time to do it.
How far is the flight from Sea-Tac Airport to Heathrow Airport?
With a flight distance of 7,700 kilometers from Sea-Tac Airport (SEA) to Heathrow Airport (LHR), this is a long-haul journey. Be sure to keep well hydrated and take a short walk down the aisle every so often.
Which airlines fly direct from Sea-Tac Airport to Heathrow Airport?
Whether you need a one-way or return flight, you'll have your pick of airlines that will fly you straight from SEA to LHR. These are some of the most popular ones:

  • British Airways - (BA) with 60 monthly flights
  • Delta Air Lines - (DL) with 30 monthly flights
  • American Airlines - (AA) with 30 monthly flights
  • Virgin Atlantic - (VS) with 30 monthly flights

Are Sea-Tac Airport to London Heathrow flight tickets cheaper when they're purchased at the last minute?
It is possible to pick up amazing last-minute deals from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport (LHR), but there's no guarantee. As many airlines release prices up to 12 months in advance, it's worth keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares carrier prices and updates flight deals all the time, so you can rest easy knowing you're always seeing the latest offers.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Singapore Airlines, Swiss International Air Lines, Turkish Airlines, United, WestJet
Roundtrip price
¥84,640
Distance
7657 km
Average flight time
17 hours 38 mins

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