SeattleLondonFlight TimeSEA–LHR
Seattle (Seattle-Tacoma International Airport) to London (London Heathrow Airport).
The flight from Seattle (SEA) to London (LHR) takes 8h 58m on average, covering about 4,998 miles. Across 3 flights we tracked, the fastest was 8h 54m and the slowest 9h, with Virgin Atlantic flying it most often.
Plan this routeAt a glance
| Avg flight time | Distance | Fastest tracked | Airlines |
|---|---|---|---|
| 8h 58m | 4,998 mi | 8h 54m | 1 |
Airlines on this route
Captured airlines for SEA to LHR
Our current provider sample includes 5-6/day from SEA to LHR across 4 captured airlines.
- First departure
- 13:30
- Last departure
- 22:05
- Cadence
- ~hourly
- Captured departures/day
- 9
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| British Airways | 2/day | Boeing 787, Boeing 777 · Seat map | 13:3020:20 |
Aircraft we tracked
Methodology: figures are aggregated from 3 real flights on this route tracked between 2026-06-09 and 2026-06-10, sourced from live flight data. Updated daily as new flights are observed.
Route FAQ
How long is the flight from SEA to LHR?
The SEA to LHR flight takes 8h 58m on average based on 3 tracked flights.
How far is SEA from LHR?
SEA to LHR is about 4,998 miles by air.
Which airlines fly from SEA to LHR?
Virgin Atlantic flies the SEA to LHR route in our tracked route data.
What aircraft fly from SEA to LHR?
Aircraft observed on SEA to LHR include Airbus A330-900neo.