
Popular airlines from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR)
- British Airways
British Airways
- Air Canada
Air Canada
- Virgin Atlantic
Virgin Atlantic
- Lufthansa
Lufthansa
- Finnair
Finnair
- Aer Lingus
Aer Lingus
- Icelandair
Icelandair
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Cheap Flights from Seattle to London (SEA-LHR)
Prices were available within the past 7 days and start at S$336 for one-way flights and S$832 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.










Find the cheapest month to fly from Seattle (SEA) to London (LHR)
October is typically the cheapest month to fly
Alternative airports near London
Prices were available within the past 7 days. Prices and availability are subject to change.
Origin airport | Seattle - Tacoma Intl. |
|---|---|
Destination airport | Heathrow |
Airlines serving | Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, KLM, United, Virgin Atlantic |
Return price | S$832 |
Distance | 7657 km |
Average flight time | 17 hours 34 mins |
Flights from Seattle to London
There are several airlines that operate frequent flights from Seattle (SEA) to London (LHR) including
- Delta Air Lines with 282 flights a week
- Alaska Airlines with 184 flights a week
- United Airlines with 141 flights a week
- Virgin Atlantic with 123 flights a week
- American Airlines with 110 flights a week
The earliest flight leaves Seattle Tacoma Intl. Airport at 13:15 and arrives at Heathrow Airport at 06:45. The last flight of the day departs Seattle at 20:37 and arrives at London at 13:35.
The flight distance from Seattle to London is about 7743 km, the shortest flight is 09 hours with WestJet.
Expedia lets you search across the largest number of airlines and London flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle London flight!
Browse through dozens of options and rest 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 to London trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.
Combine your London flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to London with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!
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