WN4254 ChicagoMDW St LouisSTL
WN4254 by Southwest Airlines flies from Chicago (MDW) to St Louis (STL).
scheduled from MDW
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at MDW and STL 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 Chicago to St Louis flights today
same route · Southwest AirlinesIf WN4254 is cancelled, these are the other Southwest Airlines nonstop flights from Chicago to St Louis on the same day, with scheduled departure times in MDW local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4254 actually runs
Pro Flight Search has tracked every published board update for WN4254 across the MDW and STL boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at MDW and STL.
The verdict above is that record speaking, so it reflects how WN4254 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around WN4254? 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 — WN4254 Chicago to St Louis on-time performance, measured from the MDW and STL airport boards.
https://proflightsearch.com/flight/WN4254
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