WN4203Southwest Airlines · CMH → STL
live · 30m ago
Route confirmed Southwest Airlines

WN4203 ColumbusCMH St LouisSTL

WN4203 by Southwest Airlines flies from Columbus (CMH) to St Louis (STL).

Right nowNext departure tomorrow Operates daily
06:05

scheduled from CMH

The route today

live boards
CMHColumbusOn-time likelyCMH delay board →
STLSt LouisOn-time likelySTL delay board →
CMH→STLevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
39%Chance of 15+ min delay
1.9%Chance of cancellation
+8 minTypical airport delay in this weather

Conditions at CMH 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 on this route

Forecast

Columbus to St Louis with Southwest Airlines · Sat 31 Oct, local date

Outlook: about usual
Chance a departure leaves 60+ min late
7.7%0.7× usual

No cancellation outlook here: this airport's board does not publish cancellations reliably.

Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 2 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Columbus to St Louis flights today

same route · Southwest Airlines
WN4884departs 06:50
WN755departs 12:35
WN4925departs 19:35
WN1914departs 20:35

If WN4203 is cancelled, these are the other Southwest Airlines nonstop flights from Columbus to St Louis on the same day, with scheduled departure times in CMH 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 WN4203 actually runs

Pro Flight Search has tracked every published board update for WN4203 across the CMH and STL boards: schedule changes, gate pushes and actual clocks. Combined risk score: 8.1/100. Based on airport operations, weather, and cached board history at CMH and STL.

The verdict above is that record speaking, so it reflects how WN4203 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN4203? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: WN4203 Columbus to St Louis on-time performance, measured from the CMH and STL airport boards.

Canonical URL
https://proflightsearch.com/flight/WN4203
How we measure this →