Be in the knowGet alerts if flight prices drop or rise*
Book smarterSave up to 40% on select hotels after you book a flight*
United flights from Seattle to London (SEA→LON)
Prices were available within the past 7 days and start at S$507 for one-way flights and S$793 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Wed, 28 Jan - Fri, 6 Feb
SEA
Seattle
LHR
London
S$793 Return, found 6 days ago
S$793
Return
found 6 days ago
Fri, 23 Jan - Thu, 5 Feb
SEA
Seattle
LHR
London
S$807 Return, found 1 day ago
S$807
Return
found 1 day ago
Thu, 19 Feb - Mon, 23 Feb
SEA
Seattle
LHR
London
S$835 Return, found 12 hours ago
S$835
Return
found 12 hours ago
Sat, 10 Jan - Fri, 23 Jan
SEA
Seattle
LGW
London
S$1,002 Return, found 3 days ago
S$1,002
Return
found 3 days ago
Sat, 10 Jan - Fri, 23 Jan
SEA
Seattle
LGW
London
S$1,026 Return, found 3 days ago
S$1,026
Return
found 3 days ago
Sat, 10 Jan - Fri, 23 Jan
SEA
Seattle
LGW
London
S$1,067 Return, found 3 days ago
S$1,067
Return
found 3 days ago
Sat, 10 Jan - Fri, 23 Jan
SEA
Seattle
LGW
London
S$1,099 Return, found 3 days ago
S$1,099
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 S$619 - S$1,157 per traveller.
Alternative airports near London
Prices were available within the past 7 days. Prices and availability are subject to change.
Travel information
Origin airport | Seattle - Tacoma Intl. |
|---|---|
Destination airport | Heathrow |
Distance | 7657 km |
Explore a world of travel with Expedia
- Air Canada San Francisco Intl. to LON-All Airports flights
- Air Europa PAR-All Airports to LON-All Airports flights
- Air India Rajiv Gandhi Intl. to LON-All Airports flights
- Air New Zealand Auckland Intl. to LON-All Airports flights
- American Airlines Dallas-Fort Worth Intl. to LON-All Airports flights
- American Airlines William P. Hobby to LON-All Airports flights
- Austrian Airlines ROM-All Airports to LON-All Airports flights
- British Airways Aberdeen to LON-All Airports flights
- British Airways Arturo Merino Benitez to LON-All Airports flights
- British Airways Charleston Intl. to LON-All Airports flights
- British Airways Dubai Intl. to LON-All Airports flights
- British Airways Frankfurt Intl. to LON-All Airports flights
- British Airways Marseille - Provence to LON-All Airports flights
- British Airways Tan Son Nhat Intl. to LON-All Airports flights
- Cathay Pacific Hong Kong Intl. to LON-All Airports flights
- China Eastern Airlines Jiaodong Intl. to LON-All Airports flights
- Delta Harry Reid Intl. to LON-All Airports flights
- Delta Miami Intl. to LON-All Airports flights
- Emirates Auckland Intl. to LON-All Airports flights
- Emirates Bandaranaike Intl. to LON-All Airports flights
- Ethiopian Airlines Dubai Intl. to LON-All Airports flights
- Eurowings Düsseldorf Intl. to LON-All Airports flights
- Finnair Tan Son Nhat Intl. to LON-All Airports flights
- Klm Houari Boumediene to LON-All Airports flights
- Klm PAR-All Airports to LON-All Airports flights
- Qatar Airways Changi to LON-All Airports flights
- Qatar Airways Netaji Subhash Chandra Bose Intl. to LON-All Airports flights
- Swiss International Air Lines QLA-All Airports to LON-All Airports flights
- United QLA-All Airports to LON-All Airports flights
- Vistara Indira Gandhi Intl. to LON-All Airports flights
- Flights from Ambler (ABL) to London (LON)
- Flights from Augusta (AGS) to London (LON)
- Flights from Amman (AMM) to London (LON)
- Flights from Beirut (BEY) to London (LON)
- Flights from Kota Kinabalu (BKI) to London (LON)
- Flights from Bangkok (BKK) to London (LON)
- Flights from Bologna (BLQ) to London (LON)
- Flights from Baltimore (BWI) to London (LON)
- Flights from Clermont-Ferrand (CFE) to London (LON)
- Flights from Cologne (CGN) to London (LON)
- Flights from Chicago (CHI) to London (LON)
- Flights from Chiang Mai (CNX) to London (LON)
- Flights from Cape Town (CPT) to London (LON)
- Flights from Dakar (DKR) to London (LON)
- Flights from Dalian (DLC) to London (LON)
- Flights from Dammam (DMM) to London (LON)
- Flights from Dubai (DXB) to London (LON)
- Flights from Barrancabermeja (EJA) to London (LON)
- Flights from Sorvagur (FAE) to London (LON)
- Flights from Freetown (FNA) to London (LON)
- Flights from Gothenburg (GOT) to London (LON)
- Flights from Geneva (GVA) to London (LON)
- Flights from Helsinki (HEL) to London (LON)
- Flights from Jacksonville (JAX) to London (LON)
- Flights from New York (JFK) to London (LON)
- Flights from Jakarta (JKT) to London (LON)
- Flights from Joinville (JOI) to London (LON)
- Flights from Medan (KNO) to London (LON)
- Flights from Kuala Lumpur (KUL) to London (LON)
- Flights from Lodz (LCJ) to London (LON)
- Flights from St. Petersburg (LED) to London (LON)
- Flights from Le Havre (LEH) to London (LON)
- Flights from Limoges (LIG) to London (LON)
- Flights from Ljubljana (LJU) to London (LON)
- Flights from Midland (MAF) to London (LON)
- Flights from Carbondale (MDH) to London (LON)
- Flights from Mexico City (MEX) to London (LON)
- Flights from Maio Island (MMO) to London (LON)
- Flights from Marseille (MRS) to London (LON)
- Flights from Montevideo (MVD) to London (LON)
- Flights from Milan (MXP) to London (LON)
- Flights from Santa Ana (NNB) to London (LON)
- Flights from Georgetown (OGL) to London (LON)
- Flights from Porto (OPO) to London (LON)
- Flights from Ostende (OST) to London (LON)
- Flights from Bucharest (OTP) to London (LON)
- Flights from Poitiers (PIS) to London (LON)
- Flights from Los Angeles (QLA) to London (LON)
- Flights from Rafha (RAH) to London (LON)
- Flights from Redding (RDD) to London (LON)
- Flights from Reykjavik (REK) to London (LON)
- Flights from Rhodes (RHO) to London (LON)
- Flights from Rio Turbio (RYO) to London (LON)
- Flights from Savannah (SAV) to London (LON)
- Flights from Santo Domingo (SDQ) to London (LON)
- Flights from Xi'an (SIA) to London (LON)
- Flights from Sydney (SYD) to London (LON)
- Flights from Tijuana (TIJ) to London (LON)
- Flights from Trondheim (TRD) to London (LON)
- Flights from Useless Loop (USL) to London (LON)
- Flights from Valencia (VLC) to London (LON)
- Flights from Santa Cruz (VVI) to London (LON)
- Flights from Washington (WAS) to London (LON)
- Flights from Brockville (XBR) to London (LON)
- Flights from Québec (YQB) to London (LON)
- Flights from Vancouver (YVR) to London (LON)
- Flights from London (YXU) to London (LON)
- Flights from Toronto (YYZ) to London (LON)
- Flights from Cahors (ZAO) to London (LON)
*Available to Expedia members.