AS421 SeattleSEA San José del CaboSJD
AS421 by Alaska Airlines flies from Seattle (SEA) to San José del Cabo (SJD).
scheduled from SEA
The route today
live boardsWhen it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
How AS421 actually runs
Pro Flight Search has tracked every published board update for AS421 across the SEA and SJD 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 SJD.
The verdict above is that record speaking, so it reflects how AS421 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SEA and SJD published them.
Planning around AS421? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS421 Seattle to San José del Cabo on-time performance, measured from the SEA and SJD airport boards.
https://proflightsearch.com/flight/AS421
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