Flights from London to Seattle
Fares, airlines, flight time and both airports for LHR–SEA.
Route snapshot: London to Seattle
London (LHR) to Seattle (SEA) is 7,702 km, about 10h 8m flying nonstop. Airlines with flights or nonstop fares on this route include American Airlines, British Airways and Virgin Atlantic. The lowest one-way fare seen recently was $515 with American Airlines (nonstop), departing 6 Apr 2027 — as of 11 Sept 2026.
Check fares, see which airlines fly this route, and sort out airports, visas, and what to do at the destination — all before you book.
When you land in Seattle
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Getting out of Seattle (SEA)
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Compare live fares from London to Seattle across 750+ airlines.
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Why travelers watch this route
Fares seen
The lowest one-way fare seen was $515 with American Airlines (nonstop), departing 6 Apr 2027; with connections it dropped to $424. Checked 11 Sept 2026 — fares move daily.
Seasonality
Seattle has year-round travel demand, so fare differences often depend more on booking window and airline competition than on one single peak season.
Who flies it
Airlines with flights or nonstop fares here include American Airlines, British Airways and Virgin Atlantic. More carriers may sell it with a connection.
Airlines flying London to Seattle
Carriers on LHR–SEA according to our route data and nonstop fares seen as of 11 Sept 2026. Not a complete list.
London–Seattle route intelligence
Updated analysis of the LHR–SEA corridor — distance, timing, and connecting options.
Route profile
London (LHR) to Seattle (SEA) is a long-haul corridor spanning approximately 7,701 km, with typical block time around 9h 45m.
Best time to book
Long-haul fares on this corridor are best booked 8-12 weeks ahead. Premium-economy upgrades are often cheapest at the 10-week mark.
Connecting hubs to compare
If a nonstop on the LHR–SEA corridor is sold out or overpriced, one-stop itineraries through London (LHR), Reykjavik (KEF), Dublin (DUB) are typically the strongest alternatives — often 20-40% cheaper than nonstop, with 3-12 hours added to total journey time.
Visa & arrival
Passport-validity and visa requirements differ between UK and — most arriving travellers need at least six months of remaining passport validity. Check AirConnect's visa checker for your nationality before booking, especially if you plan to connect through a third country en route.
Direct & Connecting Flights
Nonstop flights link London (LHR) and Seattle (SEA), taking about 10h 8m. Connecting itineraries can be cheaper but take longer.
Fares & Price Guide
The lowest one-way fare seen on LHR–SEA was $515 USD (nonstop) as of 11 Sept 2026. Set a fare alert to be told when it drops.
About Seattle
Flights arrive at Seattle–Tacoma International Airport (SEA). See the destination guide for hotels, visa requirements and travel tips.
Plan this route beyond the fare
Use the wider AirConnect network to move from a route check into airports, airlines, visa, and trip planning.
Search LHR → SEA
See current London to Seattle fares on Trip.com.
Airport Guides
Check terminals, transport and arrival details for LHR and SEA.
Airline Route Maps
Explore the networks of airlines flying from London and Seattle.
Seattle Planning
Turn this flight route into a full trip with destination, hotel and activity planning.
Price Alerts
Track fare drops on LHR–SEA and related city pairs.
Visa Guides
Check entry rules before booking flights from UK to Seattle.
Explore related route clusters
These hubs help search engines and travelers understand where this corridor sits in the wider route graph.
Deals on London → Seattle
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Frequently asked questions — London to Seattle flights
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