Rapid City to Denver

What the Data Says About RAP to DEN

The Rapid City to Denver corridor (RAP → DEN) covers roughly 300 miles and is served by 6 carriers, based on Bureau of Transportation Statistics reporting. Across 10,345 flights in the dataset, this route posts a 79.1% on-time rate with an average delay of 85.0 minutes when flights run late. Over the most recent 24 months of BTS data, 5,023 flights were recorded on this pairing — 86 cancelled (1.7%) and 16 diverted (0.3%). Those baseline metrics tell you what to expect before you book.

Having 6 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 10,345 total flights analyzed, the 79.1% on-time figure is statistically meaningful rather than a small-sample fluke. The 85.0-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, Sep 2024 posted the best performance on this corridor at 95% on-time, while Jun 2025 came in at 65% on-time — a 30-point gap between best and worst recent month. For travelers evaluating the RAP to DEN route, the combination of a 79.1% on-time rate, 85.0-minute average delay, 1.7% recent cancellation rate, and 6 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.