~ Cheap United flights from Seattle (SEA) to London (LON)

The Houses of Parliament and Big Ben in London, with a red double-decker bus crossing the Lambeth Bridge.

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Find the cheapest United flights on Expedia from Seattle (SEA) to London (LON). Flight ticket prices change frequently based on availability and demand. We send price-drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia with United for this route in the past 7 days starts at for travel on .

Find the cheapest month to fly from Seattle (SEA) to London (LON)

February is typically the cheapest month to fly

From S$814 - S$1,104 per traveller.

Travel information

Origin airport	Seattle-Tacoma International Airport
Destination airport	London
Distance	7,742 km away
Airline name	United
Airline code	UA

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Air Canada San Francisco Intl. to LON-All Airports flights
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American Airlines William P. Hobby to LON-All Airports flights
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Austrian Airlines ROM-All Airports to LON-All Airports flights
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British Airways Aberdeen to LON-All Airports flights
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British Airways Arturo Merino Benitez to LON-All Airports flights
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British Airways Dubai Intl. to LON-All Airports flights
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British Airways Frankfurt Intl. to LON-All Airports flights
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British Airways Marseille - Provence to LON-All Airports flights
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British Airways Tan Son Nhat Intl. to LON-All Airports flights
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Cathay Pacific Hong Kong Intl. to LON-All Airports flights
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China Eastern Airlines Jiaodong Intl. to LON-All Airports flights
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Delta Harry Reid Intl. to LON-All Airports flights
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Delta Miami Intl. to LON-All Airports flights
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Emirates Auckland Intl. to LON-All Airports flights
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Emirates Bandaranaike Intl. to LON-All Airports flights
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Ethiopian Airlines Dubai Intl. to LON-All Airports flights
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Eurowings Düsseldorf Intl. to LON-All Airports flights
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Finnair Tan Son Nhat Intl. to LON-All Airports flights
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Klm Houari Boumediene to LON-All Airports flights
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Klm PAR-All Airports to LON-All Airports flights
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Qatar Airways Changi to LON-All Airports flights
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Qatar Airways Netaji Subhash Chandra Bose Intl. to LON-All Airports flights
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Swiss International Air Lines QLA-All Airports to LON-All Airports flights
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United QLA-All Airports to LON-All Airports flights
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Vistara Indira Gandhi Intl. to LON-All Airports flights
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Flights from Ambler (ABL) to London (LON)
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Flights from Augusta (AGS) to London (LON)
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Flights from Baltimore (BWI) to London (LON)
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Flights from Clermont-Ferrand (CFE) to London (LON)
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Flights from Cologne (CGN) to London (LON)
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Flights from Chicago (CHI) to London (LON)
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Flights from Chiang Mai (CNX) to London (LON)
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Flights from Cape Town (CPT) to London (LON)
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Flights from Dakar (DKR) to London (LON)
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Flights from Dalian (DLC) to London (LON)
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Flights from Dammam (DMM) to London (LON)
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Flights from Dubai (DXB) to London (LON)
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Flights from Barrancabermeja (EJA) to London (LON)
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Flights from Sorvagur (FAE) to London (LON)
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Flights from Freetown (FNA) to London (LON)
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Flights from Gothenburg (GOT) to London (LON)
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Flights from Geneva (GVA) to London (LON)
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Flights from Helsinki (HEL) to London (LON)
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Flights from Jacksonville (JAX) to London (LON)
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Flights from New York (JFK) to London (LON)
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Flights from Jakarta (JKT) to London (LON)
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Flights from Joinville (JOI) to London (LON)
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Flights from Medan (KNO) to London (LON)
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Flights from Kuala Lumpur (KUL) to London (LON)
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Flights from Lodz (LCJ) to London (LON)
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Flights from St. Petersburg (LED) to London (LON)
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Flights from Le Havre (LEH) to London (LON)
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Flights from Limoges (LIG) to London (LON)
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Flights from Ljubljana (LJU) to London (LON)
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Flights from Midland (MAF) to London (LON)
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Flights from Carbondale (MDH) to London (LON)
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Flights from Mexico City (MEX) to London (LON)
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Flights from Maio Island (MMO) to London (LON)
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Flights from Marseille (MRS) to London (LON)
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Flights from Montevideo (MVD) to London (LON)
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Flights from Milan (MXP) to London (LON)
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Flights from Santa Ana (NNB) to London (LON)
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Flights from Georgetown (OGL) to London (LON)
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Flights from Porto (OPO) to London (LON)
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Flights from Ostende (OST) to London (LON)
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Flights from Bucharest (OTP) to London (LON)
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Flights from Poitiers (PIS) to London (LON)
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Flights from Los Angeles (QLA) to London (LON)
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Flights from Rafha (RAH) to London (LON)
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Flights from Redding (RDD) to London (LON)
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Flights from Reykjavik (REK) to London (LON)
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Flights from Rhodes (RHO) to London (LON)
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Flights from Rio Turbio (RYO) to London (LON)
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Flights from Savannah (SAV) to London (LON)
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Flights from Santo Domingo (SDQ) to London (LON)
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Flights from Xi'an (SIA) to London (LON)
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Flights from Sydney (SYD) to London (LON)
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Flights from Tijuana (TIJ) to London (LON)
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Flights from Trondheim (TRD) to London (LON)
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Flights from Useless Loop (USL) to London (LON)
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Flights from Valencia (VLC) to London (LON)
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Flights from Santa Cruz (VVI) to London (LON)
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Flights from Washington (WAS) to London (LON)
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Flights from Brockville (XBR) to London (LON)
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Flights from Québec (YQB) to London (LON)
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Flights from Vancouver (YVR) to London (LON)
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Flights from London (YXU) to London (LON)
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Flights from Toronto (YYZ) to London (LON)
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Flights from Cahors (ZAO) to London (LON)
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United flights to London from Seattle

Be in the know

Book smarter

Earn twice

Find the cheapest month to fly from Seattle (SEA) to London (LON)

February is typically the cheapest month to flyFebruary is typically the cheapest month to fly

Travel information

Explore a world of travel with Expedia

February is typically the cheapest month to fly