Houston to Springfield

What the Data Says About IAH to SGF

The Houston to Springfield corridor (IAH → SGF) covers roughly 513 miles and is served by 3 carriers, based on Bureau of Transportation Statistics reporting. Across 943 flights in the dataset, this route posts a 76.1% on-time rate with an average delay of 110.7 minutes when flights run late. Over the most recent 24 months of BTS data, 943 flights were recorded on this pairing — 26 cancelled (2.8%) and 4 diverted (0.4%). 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 943 total flights analyzed, the 76.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 110.7-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, Mar 2020 posted the best performance on this corridor at 92% on-time, while Jun 2025 came in at 67% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the IAH to SGF route, the combination of a 76.1% on-time rate, 110.7-minute average delay, 2.8% recent cancellation rate, and 3 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.