WN4540 San JoseSJC San DiegoSAN
WN4540 by Southwest Airlines flies from San Jose (SJC) to San Diego (SAN).
scheduled from SJC
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SJC 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 San Jose to San Diego flights today
same route · Southwest AirlinesIf WN4540 is cancelled, these are the other Southwest Airlines nonstop flights from San Jose to San Diego on the same day, with scheduled departure times in SJC local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4540 actually runs
Pro Flight Search has tracked every published board update for WN4540 across the SJC and SAN boards: schedule changes, gate pushes and actual clocks. Combined risk score: 5.0/100. Based on airport operations, weather, and cached board history at SJC and SAN.
The verdict above is that record speaking, so it reflects how WN4540 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around WN4540? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN4540 San Jose to San Diego on-time performance, measured from the SJC and SAN airport boards.
https://proflightsearch.com/flight/WN4540
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