AS3121 BoiseBOI · 13:30 Las VegasLAS · 14:31
AS3121 by Alaska Airlines flies from Boise (BOI) to Las Vegas (LAS) for the Sat, Sep 19 departure.
arrival expected at LAS · on schedule
board checked 9m 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 BOI and LAS 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 Boise to Las Vegas flights today
same route · Alaska AirlinesIf AS3121 is cancelled, these are the other Alaska Airlines nonstop flights from Boise to Las Vegas on the same day, with scheduled departure times in BOI local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS3121 actually runs
Pro Flight Search has tracked every published board update for AS3121 across the BOI and LAS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: left noticeably late (~25 min) but landed right on schedule. Not enough to call it.
The verdict above is that record speaking, so it reflects how AS3121 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: N192SY, N174SY.
Board clocks recorded as BOI and LAS published them.
Planning around AS3121? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS3121 Boise to Las Vegas on-time performance, measured from the BOI and LAS airport boards.
https://proflightsearch.com/flight/AS3121
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