Best Time to Fly IAH to CMH: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → John Glenn Columbus International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.4% of Houston (IAH) to Columbus (CMH) flights arrived on time (522 scheduled flights). That is in line with the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (85% on time) and June the worst month (57%).
The cancellation rate was 1.0% (US average 1.8%).
IAH 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 |
|---|---|---|---|---|
| United Airlines | 77.2% | 62 min | 1.0% | 517 |
| SkyWest Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to CMH
On-time arrival % by scheduled departure hour (local time), 1,098 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 2 | |
| 12pm–1pm | 82.7% | 0.2% | 396 |
| 4pm–5pm | Limited data | 2 | |
| 6pm–7pm | 79.8% | 1.5% | 397 |
| 7pm–8pm | 75.7% | 1.4% | 71 |
| 8pm–9pm | 66.4% | 0.4% | 230 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH 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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 73.0% | -8.4 pts | 2.6% | 38 |
| Summer peak (Jun 15 - Aug 15) | 62.8% | -18.6 pts | 0.6% | 182 |
| All other days | 81.3% | — | 0.8% | 854 |
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).