AS434 SeattleSEA PortlandPDX
AS434 by Alaska Airlines flies from Seattle (SEA) to Portland (PDX).
scheduled from SEA
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. Combined risk score: 64.9/100. Based on airport operations, weather, and cached board history at SEA and PDX.
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.
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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