WN4237 San DiegoSAN · 06:15 ChicagoMDW · 12:10
WN4237 by Southwest Airlines flies from San Diego (SAN) to Chicago (MDW).
scheduled from SAN
Where the minutes go
last 3 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SAN and MDW 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 San Diego
ForecastSun 8 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 Chicago
ForecastSun 8 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 San Diego to Chicago flights today
same route · Southwest AirlinesIf WN4237 is cancelled, these are the other Southwest Airlines nonstop flights from San Diego to Chicago on the same day, with scheduled departure times in SAN 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 WN4237 actually runs
Pro Flight Search has tracked every published board update for WN4237 across the SAN and MDW boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: landed -4 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN4237 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 SAN and MDW published them.
Planning around WN4237? 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: WN4237 San Diego to Chicago on-time performance, measured from the SAN and MDW airport boards.
https://proflightsearch.com/flight/WN4237
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