WN4921 SacramentoSMF · 20:40 San DiegoSAN · 22:20
WN4921 by Southwest Airlines flies from Sacramento (SMF) to San Diego (SAN) for the Fri, Oct 16 departure.
arrival expected at SAN · 88 min late
board checked 14m ago · checking again in 45s
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 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 · Southwest AirlinesIf WN4921 is cancelled, these are the other Southwest 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 WN4921 actually runs
Pro Flight Search has tracked every published board update for WN4921 across the SMF and SAN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left heavily delayed (~127 min) but landed about 9 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN4921 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: N8651A, N8760L.
Board clocks recorded as SMF and SAN published them.
Planning around WN4921? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN4921 Sacramento to San Diego on-time performance, measured from the SMF and SAN airport boards.
https://proflightsearch.com/flight/WN4921
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