Denver to Cedar Rapids/Iowa City

What the Data Says About DEN to CID

The Denver to Cedar Rapids/Iowa City corridor (DEN → CID) 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 79.5% on-time rate with an average delay of 74.0 minutes when flights run late. Over the most recent 24 months of BTS data, 2,173 flights were recorded on this pairing — 21 cancelled (1.0%) 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 79.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 74.0-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, Dec 2024 posted the best performance on this corridor at 90% on-time, while Jul 2025 came in at 64% on-time — a 26-point gap between best and worst recent month. For travelers evaluating the DEN to CID route, the combination of a 79.5% on-time rate, 74.0-minute average delay, 1.0% recent cancellation rate, and 9 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.