Dallas to St. Louis

What the Data Says About DAL to STL

The Dallas to St. Louis corridor (DAL → STL) covers roughly 546 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 11,129 flights in the dataset, this route posts a 81% on-time rate with an average delay of 58.2 minutes when flights run late. Over the most recent 24 months of BTS data, 4,070 flights were recorded on this pairing — 57 cancelled (1.4%) and 7 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 11,129 total flights analyzed, the 81% on-time figure is statistically meaningful rather than a small-sample fluke. The 58.2-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, Dec 2025 posted the best performance on this corridor at 90% on-time, while May 2024 came in at 71% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the DAL to STL route, the combination of a 81% on-time rate, 58.2-minute average delay, 1.4% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.