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Return Flights from London to Seattle
LHR ⇄ SEA
London to Seattle return, a route covering 7,701 km each way with a typical flight time of 9h 33m. Seattle is located in United States, in Americas. Fares and availability change constantly; the figures below reflect what's actually on file for this route today, not an estimate.
Return vs. two one-way tickets
Based on real fares on file: a return ticket is €963, versus €1370 for two separate one-way tickets at €685 each. The return ticket currently works out cheaper.
Weather in Seattle by season
Based on the last 3 years of real historical data.
Nearby airports
- London City Airport (LCY)36 km
- London Gatwick Airport (LGW)41 km
- London Luton Airport (LTN)45 km
- Boeing Field King County International Airport (BFI)9 km
- Tacoma Narrows Airport (TIW)29 km
- Snohomish County (Paine Field) Airport (PAE)51 km
Money-saving tips
- Book 4–8 weeks ahead of departure where possible — a general industry pattern, not specific to this route.
- Tuesday and Wednesday departures tend to be cheaper than weekend flights on most routes.
- Morning flights are often less expensive than midday or evening departures.
- Compare nearby departure and arrival airports — see the alternatives above.
- Flexible return dates widen your options considerably versus a fixed round-trip window.
Fare types explained
Most airlines sell several fare tiers on the same flight: Economy (the base fare, often with paid extras like seat selection and baggage), Premium Economy (more legroom, sometimes included baggage), Business (priority boarding, lounge access, flat or angled seating on longer routes), and First Class (offered by a shrinking number of airlines on select long-haul routes). Exact inclusions vary by airline and route — check the fare rules shown at booking.
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