AS388 St LouisSTL · 15:19 SeattleSEA · 17:41
AS388 by Alaska Airlines flies from St Louis (STL) to Seattle (SEA) for the Thu, Sep 10 departure.
departs STL · 5 min late
Where the minutes go
last 4 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 STL 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 St Louis to Seattle flights today
same route · Alaska AirlinesIf AS388 is cancelled, these are the other Alaska Airlines nonstop flights from St Louis to Seattle on the same day, with scheduled departure times in STL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS388 actually runs
Pro Flight Search has tracked every published board update for AS388 across the STL and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs ~10 min late. Based on 4 confirmed departures · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS388 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: N277AK, N431AS, N954AK.
Board clocks recorded as STL and SEA published them.
Planning around AS388? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — AS388 St Louis to Seattle on-time performance, measured from the STL and SEA airport boards.
https://proflightsearch.com/flight/AS388
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