Killeen to Houston

What the Data Says About GRK to IAH

The Killeen to Houston corridor (GRK → IAH) covers roughly 166 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 843 flights in the dataset, this route posts a 84% on-time rate with an average delay of 106.6 minutes when flights run late. Over the most recent 24 months of BTS data, 843 flights were recorded on this pairing — 22 cancelled (2.6%) and 2 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 3 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 843 total flights analyzed, the 84% on-time figure is statistically meaningful rather than a small-sample fluke. The 106.6-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, Mar 2020 posted the best performance on this corridor at 89% on-time, while Jun 2021 came in at 70% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the GRK to IAH route, the combination of a 84% on-time rate, 106.6-minute average delay, 2.6% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.