Atlanta to St. Louis

What the Data Says About ATL to STL

The Atlanta to St. Louis corridor (ATL → STL) covers roughly 484 miles and is served by 6 carriers, based on Bureau of Transportation Statistics reporting. Across 19,027 flights in the dataset, this route posts a 84.3% on-time rate with an average delay of 59.3 minutes when flights run late. Over the most recent 24 months of BTS data, 7,047 flights were recorded on this pairing — 68 cancelled (1.0%) and 13 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 6 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 19,027 total flights analyzed, the 84.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 59.3-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, Oct 2024 posted the best performance on this corridor at 93% on-time, while Jul 2024 came in at 67% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the ATL to STL route, the combination of a 84.3% on-time rate, 59.3-minute average delay, 1.0% recent cancellation rate, and 6 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.