Colorado Springs to Chicago

What the Data Says About COS to MDW

The Colorado Springs to Chicago corridor (COS → MDW) covers roughly 917 miles and is served by 1 carrier, based on Bureau of Transportation Statistics reporting. Across 1,804 flights in the dataset, this route posts a 84.4% on-time rate with an average delay of 58.9 minutes when flights run late. Over the most recent 24 months of BTS data, 877 flights were recorded on this pairing — 7 cancelled (0.8%) and 4 diverted (0.5%). Those baseline metrics tell you what to expect before you book.

Having 1 carrier on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,804 total flights analyzed, the 84.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 58.9-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, Jul 2024 posted the best performance on this corridor at 85% on-time, while Jul 2025 came in at 74% on-time — a 11-point gap between best and worst recent month. For travelers evaluating the COS to MDW route, the combination of a 84.4% on-time rate, 58.9-minute average delay, 0.8% recent cancellation rate, and 1 available carrier is the concrete summary of what BTS data shows about reliability on this pairing.