Houston to Oklahoma City

What the Data Says About IAH to OKC

The Houston to Oklahoma City corridor (IAH → OKC) covers roughly 395 miles and is served by 15 carriers, based on Bureau of Transportation Statistics reporting. Across 7,967 flights in the dataset, this route posts a 81.3% on-time rate with an average delay of 84.7 minutes when flights run late. Over the most recent 24 months of BTS data, 2,197 flights were recorded on this pairing — 34 cancelled (1.5%) and 11 diverted (0.5%). Those baseline metrics tell you what to expect before you book.

Having 15 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,967 total flights analyzed, the 81.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 84.7-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Oct 2025 posted the best performance on this corridor at 88% on-time, while May 2024 came in at 55% on-time — a 32-point gap between best and worst recent month. For travelers evaluating the IAH to OKC route, the combination of a 81.3% on-time rate, 84.7-minute average delay, 1.5% recent cancellation rate, and 15 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.