AS434 SeattleSEA · 18:51 PortlandPDX · 19:50
AS434 by Alaska Airlines flies from Seattle (SEA) to Portland (PDX) for the Tue, Sep 22 departure.
departs SEA · on schedule
board checked 3m ago · checking again in 45s
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and PDX 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 Seattle to Portland flights today
same route · Alaska AirlinesIf AS434 is cancelled, these are the other Alaska Airlines nonstop flights from Seattle to Portland on the same day, with scheduled departure times in SEA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS434 actually runs
Pro Flight Search has tracked every published board update for AS434 across the SEA and PDX boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: landed -5 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AS434 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 PDX published them.
Planning around AS434? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS434 Seattle to Portland on-time performance, measured from the SEA and PDX airport boards.
https://proflightsearch.com/flight/AS434
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