Route · GRR → MDW · 2020–2025 BTS data
Grand Rapids to Chicago
The GRR–MDW corridor (Grand Rapids, MI → Chicago, IL) runs ahead of the national average, served by 1 carrier across roughly 137 miles.
Data updated 2026-06-13
- 85.5%
- On-time
- +6.5 pts
- vs US avg
- 63 min
- Delay when late
- 5,544
- Flights
Cancelled
0.4%
Best Month
May 2025 92%
Worst Month
Sep 2025 70%
Distance
137 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 60 | 18 | 0 | 1 | WN |
| Nov 2025 | 59 | 12 | 2 | 0 | WN |
| Oct 2025 | 88 | 12 | 0 | 0 | WN |
| Sep 2025 | 86 | 26 | 0 | 0 | WN |
| Aug 2025 | 87 | 23 | 0 | 0 | WN |
| Jul 2025 | 89 | 23 | 0 | 1 | WN |
| Jun 2025 | 83 | 20 | 0 | 0 | WN |
| May 2025 | 65 | 5 | 0 | 0 | WN |
| Apr 2025 | 64 | 9 | 0 | 0 | WN |
| Mar 2025 | 66 | 12 | 0 | 0 | WN |
| Feb 2025 | 56 | 15 | 0 | 0 | WN |
| Jan 2025 | 63 | 16 | 0 | 0 | WN |
| Dec 2024 | 65 | 14 | 0 | 1 | WN |
| Nov 2024 | 62 | 9 | 0 | 0 | WN |
| Oct 2024 | 68 | 7 | 0 | 0 | WN |
| Sep 2024 | 85 | 8 | 0 | 0 | WN |
| Aug 2024 | 88 | 9 | 0 | 0 | WN |
| Jul 2024 | 89 | 16 | 0 | 1 | WN |
| Jun 2024 | 85 | 13 | 0 | 0 | WN |
| May 2024 | 89 | 11 | 0 | 1 | WN |
| Apr 2024 | 86 | 7 | 0 | 0 | WN |
| Mar 2024 | 88 | 9 | 0 | 0 | WN |
| Feb 2024 | 83 | 9 | 0 | 0 | WN |
| Jan 2024 | 89 | 26 | 6 | 0 | WN |
Cancellation Rate
0.4%
8 of 1,843 flights
Diversion Rate
0.3%
5 of 1,843 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
GRR - Grand Rapids
Full on-time, delay-cause, and seasonal performance for Grand Rapids, MI.
Origin airport →MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See GRR and MDW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to GRR–MDW.
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What the Data Says About GRR to MDW
Grand Rapids to Chicago (GRR to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.5% on-time rate across 5,544 flights, with delays that do happen averaging 62.7 minutes. The corridor runs roughly 137 miles and is served by 1 carrier. Over the most recent 24 months, 8 of 1,843 flights were cancelled (0.4%) and 5 diverted (0.3%).
The monthly split is wide on this route: May 2025 posted the strongest performance at 92% on-time, while Sep 2025 came in at just 70% - a 23-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.