AS304 SeattleSEA · 12:48 DenverDEN · 16:43
AS304 by Alaska Airlines flies from Seattle (SEA) to Denver (DEN) for the Sun, Sep 20 departure.
arrived at DEN · 24 min late
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
Early read, sample still buildingConditions at SEA and DEN 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. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.
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 Denver flights today
same route · Alaska AirlinesIf AS304 is cancelled, these are the other Alaska Airlines nonstop flights from Seattle to Denver 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 AS304 actually runs
Pro Flight Search has tracked every published board update for AS304 across the SEA and DEN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +24 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how AS304 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N948AK, N292AK, N990AK.
Board clocks recorded as SEA and DEN published them.
Planning around AS304? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS304 Seattle to Denver on-time performance, measured from the SEA and DEN airport boards.
https://proflightsearch.com/flight/AS304
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