WN399 AustinAUS · 13:45 St LouisSTL · 14:15
WN399 by Southwest Airlines flies from Austin (AUS) to St Louis (STL).
Same number through AUS → PHX → OMA → STL
scheduled from AUS
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at AUS and STL 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 AUS
ForecastThu 12 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 Phoenix
ForecastThu 12 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 Austin to St Louis flights today
same route · Southwest AirlinesIf WN399 is cancelled, these are the other Southwest Airlines nonstop flights from Austin to St Louis on the same day, with scheduled departure times in AUS 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 WN399 actually runs
Pro Flight Search has tracked every published board update for WN399 across the AUS and STL boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left heavily delayed (~101 min) but landed heavily delayed (~68 min). Not enough to call it.
The verdict above is that record speaking, so it reflects how WN399 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: N243WN, N7746C.
Board clocks recorded as AUS and STL published them.
Planning around WN399? 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: WN399 Austin to St Louis on-time performance, measured from the AUS and STL airport boards.
https://proflightsearch.com/flight/WN399
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