Seattle (SEA) to London (LHR) flights
4 airlines fly nonstop from Seattle (SEA) to London (LHR): Alaska Airlines, British Airways, Delta Air Lines and Virgin Atlantic. The two airports are 4,786 miles (7,703 km) apart. Alaska Airlines and British Airways are in oneworld and Delta Air Lines and Virgin Atlantic are in SkyTeam. There are also 49 ways to fly it with one stop, through Reykjavik, Dublin and Calgary and more.
Airlines flying nonstop from SEA to LHR
- Alaska Airlinesoneworld 路 bookable with 9 programsWho books it
- British Airwaysoneworld 路 bookable with 9 programsWho books it
- Delta Air LinesSkyTeam 路 bookable with 8 programsWho books it
- Virgin AtlanticSkyTeam 路 bookable with 9 programsWho books it
Book SEA to LHR with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Aeromexico RewardsBooks Delta Air Lines, Virgin Atlantic
- Air France-KLM Flying BlueBooks Delta Air Lines, Virgin Atlantic
- Alaska Atmos RewardsBooks Alaska Airlines, British Airways
- American AAdvantageBooks Alaska Airlines, British Airways
- British Airways ClubBooks Alaska Airlines, British Airways
- Cathay Pacific Asia MilesBooks Alaska Airlines, British Airways
- China Eastern Eastern MilesBooks Delta Air Lines, Virgin Atlantic
- Delta SkyMilesBooks Delta Air Lines, Virgin Atlantic
- Finnair PlusBooks Alaska Airlines, British Airways
- Garuda Indonesia GarudaMilesBooks Delta Air Lines, Virgin Atlantic
- Iberia ClubBooks Alaska Airlines, British Airways
- JAL Mileage BankBooks Alaska Airlines, British Airways
- Korean Air SKYPASSBooks Delta Air Lines, Virgin Atlantic
- Qantas Frequent FlyerBooks Alaska Airlines, British Airways
- Qatar Airways Privilege ClubBooks Alaska Airlines, British Airways
- SAS EuroBonusBooks Delta Air Lines, Virgin Atlantic
- Virgin Atlantic Flying ClubBooks Delta Air Lines, Virgin Atlantic
- Singapore Airlines KrisFlyerBooks Virgin Atlantic
SEA to LHR with one stop
49 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Reykjavik (KEF)Icelandair the whole way
- Via Dublin (DUB)Aer Lingus the whole way
- Via Calgary (YYC)WestJet the whole way
- Via Vancouver (YVR)Air Canada the whole way
- Via Portland (PDX)Alaska Airlines and Delta Air Lines, then British Airways
- Via Amsterdam (AMS)Delta Air Lines, then British Airways and KLM
- Via Paris (CDG)Air France the whole way
- Via Minneapolis (MSP)Delta Air Lines the whole way
- Via Copenhagen (CPH)Scandinavian Airlines the whole way
- Via Frankfurt (FRA)Lufthansa the whole way
- Via Montreal (YUL)Air Canada the whole way
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Toronto (YYZ)Air Canada the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
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- Via Detroit (DTW)Delta Air Lines the whole way
SEA to LHR: common questions
Which airlines fly nonstop from SEA to LHR?
Alaska Airlines (oneworld), British Airways (oneworld), Delta Air Lines (SkyTeam) and Virgin Atlantic (SkyTeam) fly nonstop from Seattle (SEA) to London (LHR).
How far is Seattle from London by plane?
Seattle (SEA) and London (LHR) are 4,786 miles (7,703 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book SEA to LHR award flights?
18 programs can book at least one of the nonstop airlines: Aeromexico Rewards, Air France-KLM Flying Blue, Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, China Eastern Eastern Miles, Delta SkyMiles and 10 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does SEA to LHR cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SEA to LHR with taxes and fees.
Where can I connect between Seattle and London?
The most direct connections are through Reykjavik (KEF), Dublin (DUB), Calgary (YYC), Vancouver (YVR) and Portland (PDX). On 32 of them the same airline flies both flights, for example Icelandair through Reykjavik.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.