Best Time to Fly OKC to IAH: On-Time Stats by Hour & Airline
Okc Will Rogers International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
1,285 flights were scheduled from Oklahoma City (OKC) to Houston (IAH) in the last 12 months, and 84.2% of those that flew arrived on time, 6.5 points above the US average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 85.8% on time and United Airlines was last with 79.0%.
Over 24 months, Wednesday was the most reliable day (85% on time) and June the worst month (71%).
The cancellation rate was 1.0% (US average 1.8%).
OKC 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 |
|---|---|---|---|---|
| SkyWest Airlines | 85.8% | 75 min | 0.9% | 976 |
| United Airlines | 79.0% | 68 min | 1.3% | 309 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly OKC to IAH
On-time arrival % by scheduled departure hour (local time), 2,549 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 87.9% | 1.8% | 552 |
| 6am–7am | Limited data | 5 | |
| 7am–8am | 83.3% | 1.3% | 466 |
| 8am–9am | 86.8% | 0.0% | 53 |
| 9am–10am | 85.9% | 1.1% | 279 |
| 12pm–1pm | 78.3% | 1.4% | 72 |
| 1pm–2pm | 85.6% | 0.2% | 616 |
| 2pm–3pm | 74.7% | 1.4% | 144 |
| 3pm–4pm | 72.5% | 1.6% | 122 |
| 5pm–6pm | 66.7% | 1.7% | 172 |
| 7pm–8pm | 77.9% | 0.0% | 68 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on OKC 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) | 81.6% | -1.7 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.5% | +1.2 pts | 1.7% | 60 |
| Summer peak (Jun 15 - Aug 15) | 80.4% | -2.9 pts | 1.2% | 564 |
| All other days | 83.3% | — | 1.1% | 1,887 |
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).