WN4499 LouisvilleSDF · 14:00 San JoseSJC · 14:10
WN4499 by Southwest Airlines flies from Louisville (SDF) to San Jose (SJC) for the Sun, Sep 13 departure.
Same number through SDF → DEN → SJC
arrival expected at SJC · on schedule
board checked 22m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SDF and SJC 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 Louisville to San Jose flights today
same route · Southwest AirlinesIf WN4499 is cancelled, these are the other Southwest Airlines nonstop flights from Louisville to San Jose on the same day, with scheduled departure times in SDF local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4499 actually runs
Pro Flight Search has tracked every published board update for WN4499 across the SDF and SJC boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left a little late (~11 min) but landed right on schedule. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN4499 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: N439WN, N8806Q, N8977G.
Board clocks recorded as SDF and SJC published them.
Planning around WN4499? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — WN4499 Louisville to San Jose on-time performance, measured from the SDF and SJC airport boards.
https://proflightsearch.com/flight/WN4499
.