AS637 PhoenixPHX · 11:35 SeattleSEA · 14:45
AS637 by Alaska Airlines flies from Phoenix (PHX) to Seattle (SEA) for the Fri, Oct 23 departure.
arrival expected at SEA · on schedule
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at PHX and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, 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 Phoenix to Seattle flights today
same route · Alaska AirlinesIf AS637 is cancelled, these are the other Alaska Airlines nonstop flights from Phoenix to Seattle on the same day, with scheduled departure times in PHX local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS637 actually runs
Pro Flight Search has tracked every published board update for AS637 across the PHX and SEA boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: departed +79 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AS637 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 PHX and SEA published them.
Planning around AS637? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS637 Phoenix to Seattle on-time performance, measured from the PHX and SEA airport boards.
https://proflightsearch.com/flight/AS637
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