Chicago to Atlanta

What the Data Says About MDW to ATL

The Chicago to Atlanta corridor (MDW → ATL) covers roughly 591 miles and is served by 13 carriers, based on Bureau of Transportation Statistics reporting. Across 19,604 flights in the dataset, this route posts a 82.3% on-time rate with an average delay of 69.8 minutes when flights run late. Over the most recent 24 months of BTS data, 7,342 flights were recorded on this pairing — 99 cancelled (1.3%) and 21 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 13 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 19,604 total flights analyzed, the 82.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 69.8-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 89% on-time, while Jul 2024 came in at 69% on-time — a 20-point gap between best and worst recent month. For travelers evaluating the MDW to ATL route, the combination of a 82.3% on-time rate, 69.8-minute average delay, 1.3% recent cancellation rate, and 13 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.