AS403 SeattleSEA San JoseSJC
AS403 by Alaska Airlines flies from Seattle (SEA) to San Jose (SJC).
scheduled from SEA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and SJC 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Seattle to San Jose flights today
same route · Alaska AirlinesIf AS403 is cancelled, these are the other Alaska Airlines nonstop flights from Seattle to San Jose on the same day, with scheduled departure times in SEA 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 AS403 actually runs
Pro Flight Search has tracked every published board update for AS403 across the SEA and SJC boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at SEA and SJC.
The verdict above is that record speaking, so it reflects how AS403 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around AS403? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: AS403 Seattle to San Jose on-time performance, measured from the SEA and SJC airport boards.
https://proflightsearch.com/flight/AS403
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