Your next trip, last seen at €111
Below averageFrontier Airlines · 1 stop · One wayWhen to fly
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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.
One-way fare
- Lowest observed
- €111, departing 31 Oct 2026 (Last checked: 17 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 12Check live prices for this route
- Airlines seen
- Alaska Airlines, United Airlines, American Airlines, Delta Air Lines, Frontier Airlines
- Reported fastest flight
- 1h 56m
- Non-stop
- Yes
About this route
Explore the fares we observed from San Francisco to Seattle. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,093 km
- Reported fastest flight
- 1h 56m
- Airlines seen
- Alaska Airlines, United Airlines, American Airlines, Delta Air Lines, Frontier Airlines
- Alternative airports
- BFI
Route-level information; individual journeys vary.
Published schedules report non-stop service with Alaska Airlines, United Airlines. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Alaska Airlines | 20 / 39 | |
| United Airlines | 6 / 39 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- San Francisco International Airport (SFO) → San Francisco, city gazetteer reference point (37.7749, -122.4194): ≈ 18 km.
- 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.
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 days before departure
Lowest fare from San Francisco to Seattle by days until departure (8 to 30 days): €111 (checked 17 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €128 | 8 |
| 8 to 30 days | €111 | 4 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from San Francisco to Seattle: Alaska Airlines, from €58 (checked 6 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Alaska Airlines | €58Nov 3, 2026 | 21 |
| Frontier Airlines | €60Nov 26, 2026 | 13 |
| United Airlines | €74Nov 5, 2026 | 6 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from San Francisco to Seattle?
The lowest fare we have observed is €111, found on 17 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from San Francisco to Seattle?
In our observations October 2026 is the cheapest month so far, at €111.
Are there direct flights from San Francisco to Seattle?
Yes. Published schedules report non-stop flights on this route with Alaska Airlines, United Airlines.
Which airlines fly from San Francisco to Seattle?
These are the carriers we have seen on the route: Alaska Airlines, United Airlines, American Airlines, Delta Air Lines, Frontier Airlines.
How long does the flight from San Francisco to Seattle take?
The average journey time across the 41 fares we observed is 5h 05m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed San Francisco to Seattle fares were non-stop?
35 of the 52 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from San Francisco to Seattle?
For San Francisco to Seattle, examples of observed one-way non-stop offers checked within the last 14 days: Alaska Airlines (20), United Airlines (6). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which airline has the lowest fare from San Francisco to Seattle?
Cheapest airline from San Francisco to Seattle: Alaska Airlines, from €58 (checked 6 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: 17 Oct 2026