
Popular airlines from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR)
- British Airways
British Airways
- Aer Lingus
Aer Lingus
- Lufthansa
Lufthansa
- Finnair
Finnair
- Air Canada
Air Canada
- Iberia
Iberia
- Alaska Airlines
Alaska Airlines
- Plan, book, fly with confidence
trending down icon Be in the knowGet alerts if flight prices drop or rise*bex rewards loyalty icon Book smarterSave up to 35% on select hotels after you book a flight*payments icon
Cheap Flights from Seattle (SEA) to London (LHR)
Prices were available within the past 7 days for one-way flights and round trip tickets 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
Graph displaying average flight prices per month
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Heathrow |
Airlines serving | Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet |
Return price | AU$733 |
Distance | 7657 km |
Average flight time | 17 hours 33 mins |
Your quick guide to flights from Seattle to London
Pick up great flights from Seattle to London
With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to London. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to London that take around hours.
Find cheap flights from Seattle to London
From the great flight deals with prices currently ranging from AU$734 to AU$853, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to London around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to London is normally in September.
Reasons to book your flight from Seattle to London with Expedia
Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to London across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to London right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.
Frequently asked questions
Explore a world of travel with Expedia
- Trending Routes
- Trending Flights
- Top Flights Destinations
- Related Carriers
- Alternative Routes
- Cheap Flights from Other Airports
- Expedia's Latest Trends
Top Routes from Seattle
- Seattle to Melbourne (SEA - AVV)
- Seattle to Newark Liberty Intl. Airport (SEA - EWR)
- Seattle to Los Angeles (SEA - LAX)
- Seattle to Calgary (SEA - YYC)
- Seattle to Boston (SEA - BOS)
- Seattle to New York (SEA - LGA)
- Seattle to New York (SEA - JFK)
- Seattle to Tokyo (SEA - NRT)
- Seattle to Vancouver (SEA - YVR)
- Seattle to Melbourne (SEA - MEL)
- Seattle to Baltimore (SEA - BWI)
- Seattle to Bozeman (SEA - BZN)
Top Routes to London
- Shanghai to London (PVG - LHR)
- Bangkok to London (BKK - LHR)
- Kuala Lumpur to London (KUL - LHR)
- Hong Kong to London (HKG - LHR)
- Hobart to London (HBA - LHR)
- Denpasar to London (DPS - LHR)
- Amsterdam to London (AMS - LHR)
- Darwin to London (DRW - LHR)
- Adelaide to London (ADL - LHR)
- Cairns to London (CNS - LHR)
- Gold Coast to London (OOL - LHR)
- New York to London (JFK - LHR)
Top Routes to London
Top Flight Destinations
- Flights to London
- Flights to Edinburgh
- Flights to Manchester
- Flights to Liverpool
- Flights to Glasgow
- Flights to Birmingham
- Flights to Blackpool
- Flights to York
- Flights to Bournemouth
- Flights to Brighton
- Flights to Bristol
- Flights to Cardiff
- Flights to Bath
- Flights to Oxford
- Flights to Southampton
- Flights to Newcastle-upon-Tyne
- Flights to Belfast
- Flights to Leeds
- Flights to Inverness
- Flights to Llandudno
London
Seattle Paine Field Intl. Airport
Expedia's Latest Trends
- Airfares from Sydney (SYD) to Manchester (MAN)
- Airfares from Melbourne (MEL) to Las Vegas (LAS)
- Airfares from Melbourne (MEL) to Manchester (MAN)
- Airfares from Vancouver (YVR) to Las Vegas (LAS)
- Airfares from Melbourne (MEL) to Dallas (DFW)
- Airfares from Edinburgh (EDI) to Exeter (EXT)
- Airfares from Brisbane (BNE) to Boston (BOS)
- Airfares from Brisbane (BNE) to Dallas (DFW)
- Airfares from Sydney (SYD) to Boston (BOS)
- Airfares from Melbourne (MEL) to Birmingham (BHX)
- Airfares from Sydney (SYD) to Las Vegas (LAS)
- Airfares from Perth (PER) to Manchester (MAN)
- Airfares from Honolulu (HNL) to Las Vegas (LAS)
- Airfares from Miami (MIA) to Las Vegas (LAS)
- Airfares from Sydney (SYD) to Dallas (DFW)
- Airfares from Manchester (MAN) to Paris (CDG)
- Airfares from Sydney (SYD) to San Diego (SAN)
- Airfares from Brisbane (BNE) to Manchester (MAN)
- Airfares from Melbourne (MEL) to Boston (BOS)
- Airfares from New York (NYC) to Las Vegas (LAS)
- Airfares from Los Angeles (LAX) to Dallas (DFW)
- Airfares from Los Angeles (LAX) to Las Vegas (LAS)
- Airfares from Las Vegas (LAS) to New York (JFK)
- Airfares from Perth (PER) to Las Vegas (LAS)
- Airfares from Toronto (YYZ) to New York (NYC)
- Airfares from Adelaide (ADL) to Manchester (MAN)
- Airfares from Las Vegas (LAS) to San Francisco (SFO)
- Airfares from London (LON) to New York (NYC)
- Airfares from Las Vegas (LAS) to Los Angeles (LAX)
- Airfares from Los Angeles (LAX) to San Diego (SAN)