CMH to STL flight delays & on-time performance
Nonstop flights from John Glenn Columbus International Airport to St. Louis Lambert International Airport · 409 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at CMH or STL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Columbus (CMH) to St. Louis (STL) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 5% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 7am did best (97% on time); around 8pm did worst (66%).
- Wednesday was the most reliable day to fly (92% on time) and Saturday the least (81%).
- The largest source of delay minutes was late-arriving aircraft (61%).
Which airline is most on time from CMH to STL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 85% | 0.7% | 11 min | 4.6% | 673 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am89%20 flights
- 7am97%157 flights
- 8am97%118 flights
- 9am92%53 flights
- 6pm90%50 flights
- 7pm73%82 flights
- 8pm66%137 flights
- 9pm71%38 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%1.0% cancelled
- Tuesday87%0.0% cancelled
- Wednesday92%0.0% cancelled
- Thursday83%0.0% cancelled
- Friday86%0.9% cancelled
- Saturday81%0.0% cancelled
- Sunday81%2.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft61%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion7%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
CMH to STL: common questions
- How often are CMH to STL flights on time?
- 85% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Columbus to St. Louis cancelled?
- 0.7% of scheduled flights were cancelled (5 of 673).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 4.6% of flights were an hour or more late.
- How long is taxi time at CMH?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STL to CMH — 82% on time
More flights from Columbus
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: CMH → STL, nonstop flights by US airlines that report to the DOT. How we calculate this.