Best Time to Fly CVG to IAH: On-Time Stats by Hour & Airline
Cincinnati/Northern Kentucky International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.7% of Cincinnati (CVG) to Houston (IAH) flights arrived on time (691 scheduled flights). That is 5.0 points above the national average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 83.7%, while Frontier Airlines trailed at 70.6%.
January has been the best month (94% on time) and Sunday the weakest day of the week (83%).
0.7% of flights were cancelled, versus 1.8% nationally.
CVG 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 | 83.7% | 69 min | 0.8% | 649 |
| Frontier Airlines | 70.6% | 56 min | 0.0% | 34 |
| SkyWest Airlines | Limited data | 8 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CVG to IAH
On-time arrival % by scheduled departure hour (local time), 1,254 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.6% | 1.7% | 475 |
| 7am–8am | 92.4% | 1.2% | 253 |
| 8am–9am | 96.7% | 0.0% | 60 |
| 9am–10am | 90.3% | 0.0% | 31 |
| 11am–12pm | 85.7% | 0.0% | 36 |
| 12pm–1pm | 69.7% | 0.0% | 33 |
| 1pm–2pm | Limited data | 14 | |
| 2pm–3pm | Limited data | 4 | |
| 4pm–5pm | 76.7% | 1.1% | 91 |
| 5pm–6pm | 73.3% | 0.8% | 234 |
| 6pm–7pm | Limited data | 17 | |
| 7pm–8pm | Limited data | 6 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CVG 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 | 28 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 85.4% | +0.1 pts | 1.4% | 209 |
| All other days | 85.3% | — | 0.9% | 987 |
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).