Oklahoma City (OKC) to Houston (IAH): On-Time Performance
Data through July 2026
Oklahoma City (OKC) to Houston (IAH) effectively runs on two schedules. In September 2025, 96% of arrivals were on time; in June 2025 that fell to 68% — a 29-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 70%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 3.5
- last 12 months
- Duration
- 1h 37m
- scheduled
- Distance
- 395 mi
Best airline from OKC to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 83% | 14 min | 1.3% | 2,283 |
| United Airlines | 78% | 18 min | 1.2% | 343 |
Monthly on-time trend
Best time to fly from OKC to IAH
Aim for departures around 5 a.m. (87% on-time); avoid 5 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 19 min |
| Tuesday | 84% | 13 min |
| Wednesdaybest | 85% | 12 min |
| Thursday | 83% | 14 min |
| Friday | 80% | 14 min |
| Saturday | 83% | 16 min |
| Sunday | 80% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft26%
- Airline operations40%
- National airspace system23%
- Weather10%
Frequently asked questions
- How often are flights from OKC to IAH delayed?
- 18% of OKC–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from OKC to IAH?
- SkyWest Airlines has the best on-time record on this route at 83%, based on 2,283 flights. 2 airlines flew OKC–IAH frequently enough to compare in this period.
- What is the best time of day to fly from OKC to IAH?
- Departures around 5 a.m. have the best record (87% on-time), while departures around 5 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from OKC to IAH?
- The scheduled OKC–IAH flight time averages 1h 37m over 395 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are OKC to IAH flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from OKC to IAH?
- June 2025 was the roughest month in this dataset, with only 68% of arrivals on time. The best was September 2025 at 96%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 2,626 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.