AS9400Alaska Airlines · SFO → SEA
live · 6m ago
Route confirmed Alaska Airlines

AS9400 San FranciscoSFO SeattleSEA

AS9400 by Alaska Airlines flies from San Francisco (SFO) to Seattle (SEA).

Right nowNext departure tomorrow Operates daily
15:30

scheduled from SFO

The route today

live boards
SFOSan FranciscoOn-time likelySFO delay board →
SEASeattleHigh riskSEA delay board →
SFO→SEAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
42%Chance of 15+ min delay
1.2%Chance of cancellation
+11 minTypical airport delay in this weather

Conditions at SFO and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at San Francisco

Forecast

Thu 5 Nov, local date

High20°Clikely 19°C to 21°C
Low12°Clikely 11°C to 13°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Seattle

Forecast

Thu 5 Nov, local date

High14°Clikely 13°C to 15°C
Low9°Clikely 7°C to 10°C
  • 90% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Francisco to Seattle flights today

same route · Alaska Airlines
AS620departs 06:07
AS9577departs 09:03
AS1327departs 09:43
AS580departs 11:00
AS656departs 13:51
AS630departs 15:21

If AS9400 is cancelled, these are the other Alaska Airlines nonstop flights from San Francisco to Seattle on the same day, with scheduled departure times in SFO local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How AS9400 actually runs

Pro Flight Search has tracked every published board update for AS9400 across the SFO and SEA boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at SFO and SEA.

The verdict above is that record speaking, so it reflects how AS9400 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around AS9400? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: AS9400 San Francisco to Seattle on-time performance, measured from the SFO and SEA airport boards.

Canonical URL
https://proflightsearch.com/flight/AS9400
How we measure this →