LondonSeattleDirect FlightsLHR–SEA
London (London Heathrow Airport) to Seattle (Seattle-Tacoma International Airport).
Flight time from LHR to SEA is estimated at about 10h 27m, based on the 4,786-mile great-circle distance. Our current captured departure sample includes 5-6/day across 4 captured airlines, with British Airways appearing most often in that sample. Captured departure times run from 00:09 to 18:30 local time.
Plan this routeAt a glance
| Est. flight time | Distance | Captured freq. | Type |
|---|---|---|---|
| ~10h 27m Estimated from great-circle distance — no tracked flights yet. | 4,786 mi | 5-6/day From the current provider sample; confirm live timetables before booking. | International |
Airlines on this route
Captured airlines for LHR to SEA
Our current provider sample includes 5-6/day from LHR to SEA across 4 captured airlines. Captured departure terminal data is available for 3, 5.
- First departure
- 00:09
- Last departure
- 18:30
- Cadence
- ~every 2 hours
- Captured departures/day
- 10
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| British Airways | 2/day | Boeing 787, Boeing 777 · Terminal 5 · Seat map | 09:5016:30 |
Aircraft on this route
Flying the other way?
SEA to LHR flights — 5-6/day on 4 airlines →Methodology: airline, aircraft, terminal, and departure-time details come from the rolling scheduled-departures window for LHR to SEA, last seen June 15, 2026. Frequency uses 36 scheduled departures across 7 observed days; flight time is estimated from great-circle distance until this route has enough tracked flights for an observed average. Provider coverage can miss operators on some routes, so confirm live timetables before booking.
Route FAQ
How long is the flight from LHR to SEA?
The LHR to SEA flight time is estimated at about 10h 27m from great-circle distance until enough tracked flights are available.
How far is LHR from SEA?
LHR to SEA is about 4,786 miles by air.
Which airlines fly from LHR to SEA?
Our current provider sample for LHR to SEA includes British Airways, Delta Air Lines, Alaska Airlines, Virgin Atlantic. Confirm live timetables before booking.
What aircraft fly from LHR to SEA?
Aircraft captured in our current provider sample for LHR to SEA include Airbus A330, Boeing 787, Boeing 787, Boeing 777.