WN3964 Salt Lake CitySLC · 15:35 San DiegoSAN · 16:35
WN3964 by Southwest Airlines flies from Salt Lake City (SLC) to San Diego (SAN) for the Tue, Sep 8 departure.
arrival expected at SAN · on schedule
board checked 30m 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 SLC 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 Salt Lake City to San Diego flights today
same route · Southwest AirlinesIf WN3964 is cancelled, these are the other Southwest Airlines nonstop flights from Salt Lake City to San Diego on the same day, with scheduled departure times in SLC local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN3964 actually runs
Pro Flight Search has tracked every published board update for WN3964 across the SLC and SAN boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: departed +49 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN3964 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: N8325D, N8728Q, N8911Q.
Board clocks recorded as SLC and SAN published them.
Planning around WN3964? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN3964 Salt Lake City to San Diego on-time performance, measured from the SLC and SAN airport boards.
https://proflightsearch.com/flight/WN3964
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