Oklahoma City to Houston

What the Data Says About OKC to IAH

The Oklahoma City to Houston corridor (OKC → IAH) covers roughly 395 miles and is served by 17 carriers, based on Bureau of Transportation Statistics reporting. Across 7,800 flights in the dataset, this route posts a 84.7% on-time rate with an average delay of 82.5 minutes when flights run late. Over the most recent 24 months of BTS data, 2,214 flights were recorded on this pairing — 25 cancelled (1.1%) and 15 diverted (0.7%). Those baseline metrics tell you what to expect before you book.

Having 17 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,800 total flights analyzed, the 84.7% on-time figure is statistically meaningful rather than a small-sample fluke. The 82.5-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, Sep 2025 posted the best performance on this corridor at 96% on-time, while Jun 2025 came in at 70% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the OKC to IAH route, the combination of a 84.7% on-time rate, 82.5-minute average delay, 1.1% recent cancellation rate, and 17 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.