Best Time to Fly CMH to IAH: On-Time Stats by Hour & Airline
John Glenn Columbus International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
522 flights were scheduled from Columbus (CMH) to Houston (IAH) in the last 12 months, and 78.2% of those that flew arrived on time, 0.6 points above the US 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 (84% on time) and December the worst month (66%).
The cancellation rate was 1.1% (US average 1.8%).
CMH to IAH 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 | 78.0% | 89 min | 1.2% | 517 |
| SkyWest Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CMH to IAH
On-time arrival % by scheduled departure hour (local time), 1,098 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 84.1% | 1.2% | 645 |
| 7am–8am | 94.2% | 0.0% | 69 |
| 2pm–3pm | Limited data | 1 | |
| 4pm–5pm | 65.2% | 1.0% | 200 |
| 5pm–6pm | 64.8% | 0.6% | 183 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CMH to IAH
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) | 81.1% | +1.1 pts | 2.6% | 38 |
| Summer peak (Jun 15 - Aug 15) | 72.1% | -7.9 pts | 1.6% | 182 |
| All other days | 80.0% | — | 0.9% | 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).