WN3931 SacramentoSMF · 20:30 Las VegasLAS · 22:00
WN3931 by Southwest Airlines flies from Sacramento (SMF) to Las Vegas (LAS).
scheduled from SMF
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SMF and LAS are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →
Tomorrow at Sacramento
ForecastSat 7 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at Las Vegas
ForecastSat 7 Nov, local date
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Sacramento to Las Vegas flights today
same route · Southwest AirlinesIf WN3931 is cancelled, these are the other Southwest Airlines nonstop flights from Sacramento to Las Vegas on the same day, with scheduled departure times in SMF local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How WN3931 actually runs
Pro Flight Search has tracked every published board update for WN3931 across the SMF and LAS boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: departed +3 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN3931 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: N8942L, N8817L.
Board clocks recorded as SMF and LAS published them.
Planning around WN3931? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: WN3931 Sacramento to Las Vegas on-time performance, measured from the SMF and LAS airport boards.
https://proflightsearch.com/flight/WN3931
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