Grand Rapids to Chicago

What the Data Says About GRR to ORD

The Grand Rapids to Chicago corridor (GRR → ORD) covers roughly 137 miles and is served by 34 carriers, based on Bureau of Transportation Statistics reporting. Across 14,854 flights in the dataset, this route posts a 80.9% on-time rate with an average delay of 85.2 minutes when flights run late. Over the most recent 24 months of BTS data, 6,275 flights were recorded on this pairing — 112 cancelled (1.8%) and 1 diverted (0.0%). Those baseline metrics tell you what to expect before you book.

Having 34 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 14,854 total flights analyzed, the 80.9% on-time figure is statistically meaningful rather than a small-sample fluke. The 85.2-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 95% on-time, while Dec 2025 came in at 56% on-time — a 39-point gap between best and worst recent month. For travelers evaluating the GRR to ORD route, the combination of a 80.9% on-time rate, 85.2-minute average delay, 1.8% recent cancellation rate, and 34 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.