WN1921 San AntonioSAT · 13:50 HoustonHOU · 19:55
WN1921 by Southwest Airlines flies from San Antonio (SAT) to Houston (HOU) for the Fri, Sep 11 departure.
departs SAT · on schedule
board checked 6m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SAT and HOU 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 Antonio to Houston flights today
same route · Southwest AirlinesIf WN1921 is cancelled, these are the other Southwest Airlines nonstop flights from San Antonio to Houston on the same day, with scheduled departure times in SAT local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN1921 actually runs
Pro Flight Search has tracked every published board update for WN1921 across the SAT and HOU boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +4 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN1921 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SAT and HOU published them.
Planning around WN1921? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN1921 San Antonio to Houston on-time performance, measured from the SAT and HOU airport boards.
https://proflightsearch.com/flight/WN1921
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