AS3439 SacramentoSMF · 12:52 San DiegoSAN · 14:36
AS3439 by Alaska Airlines flies from Sacramento (SMF) to San Diego (SAN) for the Wed, Sep 23 departure.
arrival expected at SAN · on schedule
board checked 21m ago · checking again in 45s
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 operationmedian arrival −4 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SMF and SAN 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 Sacramento to San Diego flights today
same route · Alaska AirlinesIf AS3439 is cancelled, these are the other Alaska Airlines nonstop flights from Sacramento to San Diego on the same day, with scheduled departure times in SMF local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS3439 actually runs
Pro Flight Search has tracked every published board update for AS3439 across the SMF and SAN boards: schedule changes, gate pushes and actual clocks. Usually lands ~19 min early. Based on 3 confirmed landings · 3/3 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how AS3439 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: N404SY, N186SY, N430SY.
Board clocks recorded as SMF and SAN published them.
Planning around AS3439? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — AS3439 Sacramento to San Diego on-time performance, measured from the SMF and SAN airport boards.
https://proflightsearch.com/flight/AS3439
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