Grand Rapids to Detroit

What the Data Says About GRR to DTW

The Grand Rapids to Detroit corridor (GRR → DTW) covers roughly 120 miles and is served by 22 carriers, based on Bureau of Transportation Statistics reporting. Across 9,220 flights in the dataset, this route posts a 87.8% on-time rate with an average delay of 88.0 minutes when flights run late. Over the most recent 24 months of BTS data, 2,943 flights were recorded on this pairing — 18 cancelled (0.6%) and 0 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 22 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 9,220 total flights analyzed, the 87.8% on-time figure is statistically meaningful rather than a small-sample fluke. The 88.0-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, Feb 2024 posted the best performance on this corridor at 97% on-time, while Dec 2025 came in at 51% on-time — a 46-point gap between best and worst recent month. For travelers evaluating the GRR to DTW route, the combination of a 87.8% on-time rate, 88.0-minute average delay, 0.6% recent cancellation rate, and 22 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.