AS439 HoustonIAH · 14:34 SeattleSEA · 17:19
AS439 by Alaska Airlines flies from Houston (IAH) to Seattle (SEA) for the Sun, Sep 6 departure.
departs IAH · 8 min early
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at IAH 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 Houston to Seattle flights today
same route · Alaska AirlinesIf AS439 is cancelled, this is the other Alaska Airlines nonstop flight from Houston to Seattle on the same day, with scheduled departure times in IAH local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS439 actually runs
Pro Flight Search has tracked every published board update for AS439 across the IAH and SEA boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: departed -1 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AS439 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 IAH and SEA published them.
Planning around AS439? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS439 Houston to Seattle on-time performance, measured from the IAH and SEA airport boards.
https://proflightsearch.com/flight/AS439
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