WN1521 WashingtonDCA · 12:00 St LouisSTL · 13:25
WN1521 by Southwest Airlines flies from Washington (DCA) to St Louis (STL).
scheduled from DCA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at DCA 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 DCA
ForecastThu 12 Nov, local date
- 90% chance of rain
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 STL
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 Washington to St Louis flights today
same route · Southwest AirlinesIf WN1521 is cancelled, these are the other Southwest Airlines nonstop flights from Washington to St Louis on the same day, with scheduled departure times in DCA 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 WN1521 actually runs
Pro Flight Search has tracked every published board update for WN1521 across the DCA and STL boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left noticeably late (~23 min) but landed about 7 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN1521 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: N8743K, N8679A.
Board clocks recorded as DCA and STL published them.
Planning around WN1521? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search: WN1521 Washington to St Louis on-time performance, measured from the DCA and STL airport boards.
https://proflightsearch.com/flight/WN1521
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