
Popular airlines from Seattle-Tacoma International Airport (SEA) to London
- Icelandair
Icelandair
- British Airways
British Airways
- Lufthansa
Lufthansa
- Finnair
Finnair
- Air Canada
Air Canada
- Aer Lingus
Aer Lingus
- Virgin Atlantic
Virgin Atlantic
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Cheap Flights from Seattle (SEA) to London (LON)
Prices were available within the past 7 days and start at ฿10,195 for one-way flights and ฿27,700 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿27,700 Return, found 3 days ago
฿27,700
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿28,295 Return, found 3 days ago
฿28,295
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿28,480 Return, found 3 days ago
฿28,480
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿29,140 Return, found 3 days ago
฿29,140
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿29,185 Return, found 3 days ago
฿29,185
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿29,325 Return, found 3 days ago
฿29,325
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿29,345 Return, found 3 days ago
฿29,345
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿29,985 Return, found 3 days ago
฿29,985
Return
found 3 days ago

Sun, 7 Sept - Sun, 14 Sept
SEA
Seattle
LHR
London
฿34,975 Return, found 3 days ago
฿34,975
Return
found 3 days ago

Sun, 21 Jun - Thu, 25 Jun
SEA
Seattle
LGW
London
฿39,720 Return, found 3 days ago
฿39,720
Return
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 ฿15,459 - ฿30,862 per traveller.
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Heathrow |
Return price | ฿27,700 |
Distance | 7657 km |
Perfect flights from Seattle to London
Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
Our flexible Seattle - Tacoma Intl. to LON-All Airports ticket options cater to your travel preferences, with incredible one-way fares from ฿10,195 and roundtrip prices from ฿27,700. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at LON-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in London.
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Top Routes from Seattle
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London Airports
London
฿27,700.00
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