Grand Rapids to Denver

What the Data Says About GRR to DEN

The Grand Rapids to Denver corridor (GRR → DEN) covers roughly 1,015 miles and is served by 20 carriers, based on Bureau of Transportation Statistics reporting. Across 7,083 flights in the dataset, this route posts a 82.8% on-time rate with an average delay of 68.0 minutes when flights run late. Over the most recent 24 months of BTS data, 2,579 flights were recorded on this pairing — 15 cancelled (0.6%) and 3 diverted (0.1%). 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 7,083 total flights analyzed, the 82.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 68.0-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, Oct 2024 posted the best performance on this corridor at 92% on-time, while Dec 2025 came in at 67% on-time — a 25-point gap between best and worst recent month. For travelers evaluating the GRR to DEN route, the combination of a 82.8% on-time rate, 68.0-minute average delay, 0.6% recent cancellation rate, and 20 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.