Cheapest€138.79
- Southwest Airlines SA506217:182h 53m20:11San Diego SANSeattle BFI
Door to door 6h 3mCO2 433.7 kgChanges 0Fixed, no changes
San Diego to Seattle flight
Flights from San Diego to Seattle start at €168.88 and take 5h 48m at their fastest.
Check dates and fares
Fares and seats move by the day. Price San Diego to Seattle on the date you actually want, rather than on the date this page was built.
The Flights from San Diego to Seattle starts at €168.88 and takes 5h 48m door to door, run by 5 operators over 1,763 km, with around 30 departures a day. Fares bottom out about 30 days before departure.
- 5h 48mDoor to door
- 2h 38mMoving
- €168.88 to €344.70From
- 06:23 to 20:12First and last departure
- 30Per day
- 433.7 kgCO2
First and last are taken from the services we sell on 5 October 2026. The return direction keeps its own timetable and is not these times reversed.
€168.88 to €344.70 for one passenger across the 14 departure dates priced here. The low end is one day, not every day. Worked out from this corridor rather than held for anybody. The operator sets the price on the day.
Fares by date
What this journey usually costs, by departure date. It shows which days run dearer.
Typical fares
- about €292.19Tue15
- about €273.31Wed16
- about €344.70Thu17
- about €256.79Fri18
- about €268.59Sat19
- about €253.25Sun20
- about €213.13Mon21
- about €168.88Tue22
- about €178.32Wed23
- about €228.47Thu24
- about €207.82Fri25
- about €211.95Sat26
- about €197.20Sun27
- about €170.65Mon28
Based on what this route has cost recently. The operator sets the price on the day, and the live fare is confirmed when you book.
The cheapest and the fastest on 5 October 2026
Fastest€183.04
- SkyWest SW429817:192h 38m19:57San Diego SANSeattle SEA
Door to door 5h 48mCO2 433.7 kgChanges 0Fixed, no changes
Airlines
| Operator | From | Fastest |
|---|---|---|
 Alaska Airlines | €143.51 | 5h 47m |
 Delta Air Lines | €141.15 | 5h 48m |
 Horizon Air | €139.97 | 5h 47m |
 Southwest Airlines | €138.79 | 5h 48m |
 SkyWest | €141.15 | 5h 47m |
The flight gets you into Seattle. It does not get you a bed, and neither do we.
A room in Seattle for the night the flight gets in
Sort by distance from Seattle King Street and you can see which places are ten minutes on foot and which are not.
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When to book San Diego to Seattle
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €159.4490 days
- €132.8960 days
- €151.1845 days
- €122.8630 days
- €138.7921 days
- €170.6514 days
- €213.137 days
- €344.703 days
- €292.191 days
- Cheapest lead time
- Fares bottom out around 30 days ahead, at €122.86.
- How much it moves
- The gap between the cheapest and dearest lead time is 181 percent. The dearest point is €344.70, 3 days out.
- What that means
- Today sits inside the cheap window, which closes about 30 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €197.20Sun
- €170.65Mon
- €168.88Tue
- €178.32Wed
- €228.47Thu
- €207.82Fri
- €211.95Sat
Where you leave from and where you arrive
San Diego
Air
- SAN
Seattle
Air
- SEA
- BFI
What the journey actually looks like
- How far it really runs
- The route covers 1,763 km against 1,712 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- First and last departure
- The first service of the day leaves San Diego at 06:23 and the last at 20:12, across 30 departures The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about San Diego to Seattle
The questions people actually ask about this journey, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Flight from San Diego to Seattle take?
The Flight from San Diego to Seattle takes 5h 48m door to door, of which 2h 38m is spent moving. The route runs 1,763 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from San Diego to Seattle cost?
The Flight from San Diego to Seattle starts at €168.88 for one passenger, as of 14 September 2026. A typical fare is €169.18. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from San Diego to Seattle?
5 operators run the Flight from San Diego to Seattle: Alaska Airlines, Delta Air Lines, Horizon Air, Southwest Airlines, SkyWest. Between them they file around 30 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from San Diego to Seattle use?
The Flight from San Diego to Seattle leaves from San Diego SAN and arrives at Seattle SEA. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from San Diego to Seattle?
Fares for the Flight from San Diego to Seattle bottom out around 30 days ahead, at €122.86. The gap between the cheapest and dearest lead time across the window is 181 percent, measured on 14 September 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from San Diego to Seattle produce?
The Flight from San Diego to Seattle produces about 433.7 kg of CO2 per passenger over 1763 km, which works out at roughly 246 grams per passenger kilometre. That figure is for the whole journey and for one traveller, not for the vehicle.
Where these numbers come from
Places, coordinates, operators, which operator serves which pair, and every distance on this page are real and come from open data. Where a corridor has a filed timetable the departure times are real too, and ferry fares are the prices the operators publish themselves.
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Where no operator publishes a fare for a corridor, the price here is our own estimate, worked out from the real distance and the real operator through a fare curve that follows lead time, day of the week and season. It tells you roughly what the journey costs. It is not a seat anyone has agreed to sell, and the payment step will not take it.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for San Diego to Seattle on 14 September 2026: 1763 km of route against 1712 km in a straight line, 30 services a day, 5 operators a cheapest fare of €168.88, and 5h 48m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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