
Popular airlines from Seattle-Tacoma International Airport (SEA) to London
- Icelandair
Icelandair
- British Airways
British Airways
- Lufthansa
Lufthansa
- Air Canada
Air Canada
- Finnair
Finnair
- Aer Lingus
Aer Lingus
- Virgin Atlantic
Virgin Atlantic
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 40% on select hotels after you book a flight*
Cheap Flights from Seattle (SEA) to London (LON)
Prices were available within the past 7 days and start at ฿8,395 for one-way flights and ฿17,705 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, 18 Mar - Sun, 29 Mar
SEA
Seattle
LHR
London
฿17,705 Return, found 5 days ago
฿17,705
Return
found 5 days ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿20,795 Return, found 5 days ago
฿20,795
Return
found 5 days ago

Thu, 19 Mar - Sun, 29 Mar
SEA
Seattle
LHR
London
฿21,025 Return, found 5 days ago
฿21,025
Return
found 5 days ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿21,335 Return, found 5 days ago
฿21,335
Return
found 5 days ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿21,570 Return, found 5 days ago
฿21,570
Return
found 5 days ago

Thu, 11 Dec - Sat, 10 Jan
SEA
Seattle
LHR
London
฿21,645 Return, found 1 day ago
฿21,645
Return
found 1 day ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿21,710 Return, found 5 days ago
฿21,710
Return
found 5 days ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿21,785 Return, found 5 days ago
฿21,785
Return
found 5 days ago

Fri, 28 Nov - Tue, 2 Dec
SEA
Seattle
LHR
London
฿22,190 Return, found 5 days ago
฿22,190
Return
found 5 days ago

Thu, 11 Dec - Sat, 10 Jan
SEA
Seattle
LHR
London
฿22,195 Return, found 1 day ago
฿22,195
Return
found 1 day ago
Find the cheapest month to fly from Seattle (SEA) to London (LON)
October is typically the cheapest month to fly
From ฿15,024 - ฿29,110 per traveller.
Travel information
Origin airport | Seattle - Tacoma Intl. |
|---|---|
Destination airport | Heathrow |
Return price | ฿17,705 |
Distance | 7657 km |
Book with confidence
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 ฿8,395 and roundtrip prices from ฿17,705. 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.
Explore a world of travel with Expedia
- Trending Routes
- Trending Flights
- Top Flights Destinations
- Related Airlines
- Nearby Airports
- Cheap Flights from Other Airports
- Expedia's Latest Trends
Top Routes from Seattle
- Seattle to Bangkok (SEA - BKK)
- Seattle to Miami (SEA - MIA)
- Seattle to Kalispell (SEA - FCA)
- Seattle to Portland (SEA - PDX)
- Seattle to Denver (SEA - DEN)
- Seattle to New York (SEA - JFK)
- Seattle to Tokyo (SEA - NRT)
- Seattle to Nashville (SEA - BNA)
- Seattle to Seoul (SEA - ICN)
- Seattle to Anchorage (SEA - ANC)
- Seattle to London (SEA - LHR)
Top Routes from Seattle
Top Flight Destinations
- Flights to London
- Flights to Edinburgh
- Flights to Manchester
- Flights to York
- Flights to Liverpool
- Flights to Glasgow
- Flights to Birmingham
- Flights to Bath
- Flights to Blackpool
- Flights to Bristol
- Flights to Newcastle-upon-Tyne
- Flights to Cardiff
- Flights to Belfast
- Flights to Leeds
- Flights to Oxford
- Flights to Brighton
- Flights to Chester
- Flights to Cambridge
- Flights to Nottingham
- Flights to Bournemouth
London Airports
London
฿17,705.00
Nearby Airports
Expedia's Latest Trends
Flights
- Flights from Suvarnabhumi Intl. to LON-All Airports
- Flights from Suvarnabhumi Intl. to NYC-All Airports
- Flights from Bangkok (BKK) to San Diego (SAN)
- Flights from Chiang Mai (CNX) to Manchester (MAN)
- Flights from Bangkok (BKK) to Cleveland (CLE)
- Flights from Boston (BOS) to Los Angeles (LAX)
- Flights from Bangkok (BKK) to Omaha (OMA)
- Flights from Bangkok (BKK) to Boston (BOS)
- Flights from Los Angeles Intl. to NYC-All Airports
- Flights from Bangkok (BKK) to Houston (HOU)
- Flights from Bangkok (BKK) to Paisley (GLA)
- Flights from Bangkok (BKK) to Dallas (DFW)
- Flights from Bangkok (BKK) to Anchorage (ANC)
- Flights from NYC-All Airports to Los Angeles Intl.
- Flights from Bangkok (BKK) to Spokane (GEG)
- Flights from Las Vegas (LAS) to San Francisco (SFO)
- Flights from Dallas (DFW) to Bangkok (BKK)
- Flights from San Francisco (SFO) to Las Vegas (LAS)
- Flights from Manchester (MAN) to Bangkok (BKK)
- Flights from Los Angeles (LAX) to Las Vegas (LAS)
- Flights from Bangkok (BKK) to St. Louis (STL)
- Flights from Bangkok (BKK) to Philadelphia (PHL)
- Flights from Cleveland (CLE) to Bangkok (BKK)
- Emirates Bangkok (BKK) to Manchester (MAN) flights
- Flights from Las Vegas (LAS) to Bangkok (BKK)
- Flights from Boston (BOS) to Bangkok (BKK)
- Flights from Bangkok (BKK) to Manchester (MAN)
- Flights from Sa Khu (HKT) to Manchester (MAN)
- Flights from Bangkok (BKK) to Pittsburgh (PIT)
- Flights from Bangkok (BKK) to Las Vegas (LAS)
*Available to Expedia members.