John Glenn Columbus International (CMH) Delays and On-Time Departures
Columbus, OH · ranked 147th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
81.2% of the 44,711 flights scheduled to depart Columbus (CMH) in the last 12 months left on time, 3.7 points above the US average of 77.4%.
That ranks 147th of 333 US airports tracked on this site, with 2.0% of departures cancelled.
Among airlines at Columbus (CMH), Delta Air Lines left on time most often (87.3%).
Over 24 months, Wednesday was the most reliable day (86% on time) and July the worst month (76%).
Best time of day to fly out of Columbus (CMH)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.2% | 1.2% | 4,226 |
| 6am–7am | 93.0% | 1.4% | 12,162 |
| 7am–8am | 90.0% | 1.0% | 8,373 |
| 8am–9am | 90.2% | 1.2% | 6,381 |
| 9am–10am | 89.9% | 1.6% | 3,383 |
| 10am–11am | 87.8% | 1.4% | 5,099 |
| 11am–12pm | 85.4% | 1.4% | 5,565 |
| 12pm–1pm | 80.8% | 1.4% | 4,925 |
| 1pm–2pm | 81.4% | 1.4% | 3,834 |
| 2pm–3pm | 77.2% | 1.8% | 5,044 |
| 3pm–4pm | 72.6% | 1.7% | 4,761 |
| 4pm–5pm | 73.3% | 2.5% | 4,901 |
| 5pm–6pm | 71.4% | 2.9% | 6,203 |
| 6pm–7pm | 70.4% | 2.6% | 6,154 |
| 7pm–8pm | 67.9% | 2.3% | 4,300 |
| 8pm–9pm | 63.8% | 2.0% | 2,447 |
| 9pm–10pm | 66.4% | 2.0% | 852 |
| 10pm–11pm | Limited data | 24 | |
Airlines at CMH ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Delta Air Lines | 87.3% | 87.6% | 1.4% | 3,726 |
| Republic Airways | 85.0% | 82.5% | 3.0% | 13,080 |
| Envoy Air | 84.8% | 81.1% | 1.1% | 3,076 |
| American Airlines | 81.5% | 81.8% | 2.2% | 4,181 |
| United Airlines | 78.2% | 74.2% | 1.4% | 3,302 |
| Southwest Airlines | 77.7% | 80.8% | 1.0% | 12,293 |
| SkyWest Airlines | 76.8% | 75.9% | 3.0% | 1,344 |
| PSA Airlines | 76.7% | 75.9% | 3.8% | 1,702 |
| Alaska Airlines | 72.2% | 71.9% | 1.1% | 460 |
| Spirit Airlines | 72.0% | 74.5% | 3.4% | 1,009 |
| Frontier Airlines | 70.9% | 66.7% | 2.2% | 538 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of CMH
On-time departures by day, 24 months.
Best month to fly out of CMH
On-time departures by month, 24 months.
Holiday travel at Columbus (CMH)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 79.7% | -3.9 pts | 1.2% | 1,712 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.2% | -8.4 pts | 0.8% | 3,247 |
| Summer peak (Jun 15 - Aug 15) | 77.3% | -6.3 pts | 2.8% | 15,785 |
| All other days | 83.6% | — | 1.5% | 67,890 |
Monthly on-time departure trend at CMH
On-time departure % each month, with the 12-month US average for reference.
Routes from Columbus (CMH)
Every route from CMH with its own page, by number of flights (last 12 months, on-time arrivals).