Southwest AirlinesWN100% on time
Flights WN3818 varies Sa Su · WN3185 10:10 Mo Th Fr · WN3940 varies Mo Tu We Th Fr Su
live
Direct flights from St Louis (STL) to Columbus (CMH): 7 nonstop departures observed each week across 1 airline. 100% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 8 minutes late. No cancellations were recorded across the 8 tracked flights. The nonstop covers 657 km, an estimated 1 hour 21 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Columbus. Updated 13 September 2026 at 21:53 UTC.
STL
St Louis
busy · +21
CMH
Columbus
smooth · +0
657 km · ~1h 21m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 8 operated STL → CMH flights arrived within 15 minutes
Median arrival delay is +8 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+8 minacross the last 8 operated legs
Flight time~1h 21mestimated from route distance
Weekly departures7x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at STL and CMH: 43% odds of a 15+ minute delay, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the St Louis to Columbus route actually runs
Pro Flight Search records official board updates for nonstop STL to CMH flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · 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 — St Louis (STL) to Columbus (CMH) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STL-CMH
STL to CMH questions
Is STL–CMH running on time right now?
Smooth skies ahead. The departure side at STL is the weaker end, route health score 86/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from STL to CMH?
Great-circle distance is 657 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 76–86 min gate-to-gate on this route.
How often does STL–CMH fly?
Southwest Airlines runs the route with about 11 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at STL and arrival-side delay at CMH, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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