Green Bay to Detroit

What the Data Says About GRB to DTW

The Green Bay to Detroit corridor (GRB → DTW) covers roughly 287 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 5,639 flights in the dataset, this route posts a 89% on-time rate with an average delay of 100.7 minutes when flights run late. Over the most recent 24 months of BTS data, 1,891 flights were recorded on this pairing — 20 cancelled (1.1%) and 1 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 5,639 total flights analyzed, the 89% on-time figure is statistically meaningful rather than a small-sample fluke. The 100.7-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, Nov 2023 posted the best performance on this corridor at 95% on-time, while Jan 2024 came in at 71% on-time — a 24-point gap between best and worst recent month. For travelers evaluating the GRB to DTW route, the combination of a 89% on-time rate, 100.7-minute average delay, 1.1% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.