Denver to Grand Rapids

What the Data Says About DEN to GRR

The Denver to Grand Rapids corridor (DEN → GRR) covers roughly 1,015 miles and is served by 20 carriers, based on Bureau of Transportation Statistics reporting. Across 7,081 flights in the dataset, this route posts a 75.9% on-time rate with an average delay of 61.8 minutes when flights run late. Over the most recent 24 months of BTS data, 2,581 flights were recorded on this pairing — 12 cancelled (0.5%) and 6 diverted (0.2%). Those baseline metrics tell you what to expect before you book.

Having 20 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 7,081 total flights analyzed, the 75.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 61.8-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, Oct 2024 posted the best performance on this corridor at 91% on-time, while May 2025 came in at 54% on-time — a 36-point gap between best and worst recent month. For travelers evaluating the DEN to GRR route, the combination of a 75.9% on-time rate, 61.8-minute average delay, 0.5% recent cancellation rate, and 20 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.