Best Time to Fly STL to CMH: On-Time Stats by Hour & Airline
St Louis Lambert International → John Glenn Columbus International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.7% of St. Louis (STL) to Columbus (CMH) flights arrived on time (675 scheduled flights). That is 4.0 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Friday was the most reliable day (84% on time) and June the worst month (70%).
The cancellation rate was 0.3% (US average 1.8%).
STL to CMH on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 81.7% | 53 min | 0.3% | 675 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly STL to CMH
On-time arrival % by scheduled departure hour (local time), 1,345 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 90.5% | 1.0% | 192 |
| 8am–9am | 93.9% | 0.0% | 247 |
| 9am–10am | 90.4% | 3.5% | 86 |
| 10am–11am | 92.9% | 0.0% | 112 |
| 11am–12pm | Limited data | 8 | |
| 12pm–1pm | Limited data | 8 | |
| 1pm–2pm | Limited data | 14 | |
| 2pm–3pm | Limited data | 9 | |
| 3pm–4pm | Limited data | 24 | |
| 4pm–5pm | Limited data | 6 | |
| 5pm–6pm | Limited data | 27 | |
| 6pm–7pm | 79.7% | 0.9% | 210 |
| 7pm–8pm | 68.9% | 0.0% | 167 |
| 8pm–9pm | 71.4% | 0.5% | 212 |
| 9pm–10pm | Limited data | 23 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on STL to CMH
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 25 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 78.2% | -5.4 pts | 0.0% | 55 |
| Summer peak (Jun 15 - Aug 15) | 77.0% | -6.6 pts | 0.0% | 231 |
| All other days | 83.6% | — | 0.8% | 1,034 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).