Chicago to Atlanta

What the Data Says About ORD to ATL

The Chicago to Atlanta corridor (ORD → ATL) covers roughly 606 miles and is served by 54 carriers, based on Bureau of Transportation Statistics reporting. Across 34,113 flights in the dataset, this route posts a 79.8% on-time rate with an average delay of 80.2 minutes when flights run late. Over the most recent 24 months of BTS data, 11,858 flights were recorded on this pairing — 178 cancelled (1.5%) and 34 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 54 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 34,113 total flights analyzed, the 79.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 80.2-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, Oct 2024 posted the best performance on this corridor at 89% on-time, while Jul 2024 came in at 60% on-time — a 29-point gap between best and worst recent month. For travelers evaluating the ORD to ATL route, the combination of a 79.8% on-time rate, 80.2-minute average delay, 1.5% recent cancellation rate, and 54 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.