St. Louis to Atlanta

What the Data Says About STL to ATL

The St. Louis to Atlanta corridor (STL → ATL) covers roughly 484 miles and is served by 6 carriers, based on Bureau of Transportation Statistics reporting. Across 19,051 flights in the dataset, this route posts a 86.9% on-time rate with an average delay of 68.5 minutes when flights run late. Over the most recent 24 months of BTS data, 7,101 flights were recorded on this pairing — 70 cancelled (1.0%) and 18 diverted (0.3%). 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 19,051 total flights analyzed, the 86.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 68.5-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, Sep 2025 posted the best performance on this corridor at 95% on-time, while Jul 2024 came in at 68% on-time — a 27-point gap between best and worst recent month. For travelers evaluating the STL to ATL route, the combination of a 86.9% on-time rate, 68.5-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.