Houston to Gulfport/Biloxi

What the Data Says About IAH to GPT

The Houston to Gulfport/Biloxi corridor (IAH → GPT) covers roughly 376 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 653 flights in the dataset, this route posts a 92.2% on-time rate with an average delay of 101.6 minutes when flights run late. Over the most recent 24 months of BTS data, 653 flights were recorded on this pairing — 34 cancelled (5.2%) and 1 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 653 total flights analyzed, the 92.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 101.6-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, May 2020 posted the best performance on this corridor at 95% on-time, while Jan 2020 came in at 89% on-time — a 6-point gap between best and worst recent month. For travelers evaluating the IAH to GPT route, the combination of a 92.2% on-time rate, 101.6-minute average delay, 5.2% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.