Cedar Rapids/Iowa City to Denver

What the Data Says About CID to DEN

The Cedar Rapids/Iowa City to Denver corridor (CID → DEN) covers roughly 692 miles and is served by 9 carriers, based on Bureau of Transportation Statistics reporting. Across 6,265 flights in the dataset, this route posts a 81.8% on-time rate with an average delay of 91.3 minutes when flights run late. Over the most recent 24 months of BTS data, 2,174 flights were recorded on this pairing — 31 cancelled (1.4%) and 6 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 9 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 6,265 total flights analyzed, the 81.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 91.3-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 2024 posted the best performance on this corridor at 94% on-time, while Jul 2025 came in at 58% on-time — a 37-point gap between best and worst recent month. For travelers evaluating the CID to DEN route, the combination of a 81.8% on-time rate, 91.3-minute average delay, 1.4% recent cancellation rate, and 9 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.