Louisville to Atlanta

What the Data Says About SDF to ATL

The Louisville to Atlanta corridor (SDF → ATL) covers roughly 321 miles and is served by 17 carriers, based on Bureau of Transportation Statistics reporting. Across 16,538 flights in the dataset, this route posts a 89.5% on-time rate with an average delay of 81.0 minutes when flights run late. Over the most recent 24 months of BTS data, 5,568 flights were recorded on this pairing — 63 cancelled (1.1%) and 7 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 17 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 16,538 total flights analyzed, the 89.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 81.0-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 99% on-time, while Jun 2025 came in at 80% on-time — a 19-point gap between best and worst recent month. For travelers evaluating the SDF to ATL route, the combination of a 89.5% on-time rate, 81.0-minute average delay, 1.1% recent cancellation rate, and 17 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.