LHR → SEA · direct available
Cheap flights from London to Seattle
We track fares from London to Seattle, United States every day. Across 129 prices we've logged, the cheapest was €368 return and a typical fare runs around €539. The cheapest month to fly is usually Nov 2026.
Cheapest seen
€368
Typical price
€539
Cheapest month
Nov 2026
Non-stop
Available
No live deal on this exact route right now — but the typical fare is around €539. Search your dates below, or browse all current deals.
Cheapest months to fly
The typical cheapest fare by month, from our tracking — a guide only. Check the live price on Aviasales before booking.
| Month | Typical from | Check price |
|---|---|---|
| Oct 2026 | €496 | Check on Aviasales → |
| Nov 2026 | €403 | Check on Aviasales → |
| Jan 2027 | €409 | Check on Aviasales → |
Each link opens the live Aviasales search for that month, where you can pick the exact cheapest dates.
Book a flight
London to Seattle: the basics
- Route
- London (LHR) → Seattle (SEA)
- Distance
- 7,702 km
- Non-stop
- Yes
- Airlines seen
- American Airlines, AS, EI, FI, Lufthansa, United Airlines
Planning the trip? United States: what to see and when to go covers where to go and when.