AS3143 SpokaneGEG · 12:17 SeattleSEA · 13:34
AS3143 by Alaska Airlines flies from Spokane (GEG) to Seattle (SEA) for the Sun, Sep 13 departure.
departs GEG · 28 min late
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operation0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Early read, sample still buildingConditions at GEG 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. 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 Spokane to Seattle flights today
same route · Alaska AirlinesIf AS3143 is cancelled, these are the other Alaska Airlines nonstop flights from Spokane to Seattle on the same day, with scheduled departure times in GEG local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS3143 actually runs
Pro Flight Search has tracked every published board update for AS3143 across the GEG and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs ~19 min late. Based on 5 confirmed departures · 2/5 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how AS3143 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: N409SY, N191SY.
Board clocks recorded as GEG and SEA published them.
Planning around AS3143? 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 — AS3143 Spokane to Seattle on-time performance, measured from the GEG and SEA airport boards.
https://proflightsearch.com/flight/AS3143
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