Best Time to Fly IAH to CVG: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Cincinnati/Northern Kentucky International
Data through July 2026 · Last updated October 18, 2026
691 flights were scheduled from Houston (IAH) to Cincinnati (CVG) in the last 12 months, and 75.0% of those that flew arrived on time, 2.6 points below the US average of 77.6%.
Among 2 airlines, United Airlines led with 75.6% on time and Frontier Airlines was last with 66.7%.
Over 24 months, Tuesday was the most reliable day (83% on time) and December the worst month (62%).
The cancellation rate was 0.9% (US average 1.8%).
IAH to CVG 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 | 75.6% | 58 min | 0.8% | 649 |
| Frontier Airlines | 66.7% | 55 min | 2.9% | 34 |
| SkyWest Airlines | Limited data | 8 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to CVG
On-time arrival % by scheduled departure hour (local time), 1,253 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 97.0% | 0.0% | 33 |
| 8am–9am | 90.0% | 3.2% | 31 |
| 9am–10am | Limited data | 11 | |
| 12pm–1pm | 83.7% | 0.6% | 329 |
| 1pm–2pm | Limited data | 2 | |
| 2pm–3pm | Limited data | 23 | |
| 3pm–4pm | Limited data | 25 | |
| 5pm–6pm | Limited data | 4 | |
| 6pm–7pm | 74.6% | 0.0% | 126 |
| 7pm–8pm | 70.4% | 1.8% | 55 |
| 8pm–9pm | 68.1% | 1.3% | 597 |
| 9pm–10pm | Limited data | 17 | |
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 CVG
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 | 27 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 67.6% | -8.2 pts | 1.4% | 210 |
| All other days | 75.8% | — | 0.8% | 986 |
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).