Chicago to Charleston

What the Data Says About ORD to CHS

The Chicago to Charleston corridor (ORD → CHS) covers roughly 760 miles and is served by 40 carriers, based on Bureau of Transportation Statistics reporting. Across 7,740 flights in the dataset, this route posts a 83.2% on-time rate with an average delay of 64.6 minutes when flights run late. Over the most recent 24 months of BTS data, 3,151 flights were recorded on this pairing — 42 cancelled (1.3%) and 5 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 40 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,740 total flights analyzed, the 83.2% on-time figure is statistically meaningful rather than a small-sample fluke. The 64.6-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, Nov 2024 posted the best performance on this corridor at 94% on-time, while Jul 2025 came in at 66% on-time — a 27-point gap between best and worst recent month. For travelers evaluating the ORD to CHS route, the combination of a 83.2% on-time rate, 64.6-minute average delay, 1.3% recent cancellation rate, and 40 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.