Seattle to London flights
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- Lowest observed
- €285, departing 15 Nov 2026 (Last checked: 8 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 19Check live prices for this route
- Airlines seen
- British Airways, Aer Lingus, Air Canada, Alaska Airlines, Condor, Delta Air Lines +6 more
- Reported fastest flight
- 9h 25m
- Non-stop
- Yes
Your next trip, last seen at €285
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
About this route
Explore the fares we observed from Seattle to London. Prices move often, so pick your dates to see the latest options.
- Route distance
- 7,700 km
- Reported fastest flight
- 9h 25m
- Airlines seen
- British Airways, Aer Lingus, Air Canada, Alaska Airlines, Condor, Delta Air Lines +6 more
- Alternative airports
- BFI, LCY, LGW, LTN, SEN, STN
Route-level information; individual journeys vary.
Published schedules report non-stop service with British Airways. Check current timetables.
A clearer picture of your fare
Airport to city: straight-line distance
- King County International Airport - Boeing Field (BFI) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 9 km.
- Seattle–Tacoma International Airport (SEA) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 18 km.
- London City Airport (LCY) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 13 km.
- London Heathrow (LHR) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 23 km.
- London Gatwick (LGW) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 40 km.
- London Luton (LTN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 44 km.
- London Stansted (STN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 49 km.
- London Southend Airport (SEN) → London, city gazetteer reference point (51.5074, -0.1278): ≈ 57 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by day of the week
Cheapest day of the week from Seattle to London: Sunday, from €285 (checked 8 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €453 | 3 |
| Tuesday | €453 | 3 |
| Wednesday | €453 | 3 |
| Thursday | €310 | 3 |
| Sunday | €285 | 3 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Frequently asked
How much is a flight from Seattle to London?
The lowest fare we have observed is €285, found on 8 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Seattle to London?
In our observations November 2026 is the cheapest month so far, at €285.
Are there direct flights from Seattle to London?
Yes. We have seen non-stop flights on this route, flown by British Airways.
Which airlines fly from Seattle to London?
These are the carriers we have seen on the route: British Airways, Aer Lingus, Air Canada, Alaska Airlines, Condor, Delta Air Lines +6 more.
How many of the observed Seattle to London fares were non-stop?
15 of the 26 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which day of the week is cheapest from Seattle to London?
Cheapest day of the week from Seattle to London: Sunday, from €285 (checked 8 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 8 Oct 2026