Route · GRR → MDW · 2020–2025 BTS data
Grand Rapids to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), GRR to MDW (Grand Rapids to Chicago) ranks #2247 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 85.5%
- On-time
- +6.5 pts
- vs US avg
- 63 min
- Delay when late
- 5,544
- Flights
- #2247 of 4927
- Corpus placement
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 |
GRR–MDW seasonal on-time pattern
Best: May (91.9%) · weakest: July (78.4%)
Strongest calendar month
May
91.9% on-time · ~76 flights/mo
Busiest calendar month
August
~86 flights/mo avg
Weakest calendar month
July
78.4% on-time · ~83 flights/mo
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.
GRR on-time profileMDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
MDW on-time profileCompare the two airports
See GRR and MDW side by side on delays, cancellations, and reliability.
Compare GRR vs MDWOrigin-hub reliability standing
Among GRR's stronger departures
GRR → MDW posts a 85.5% on-time rate, landing in the ≥85% band with 5 of 20 BTS-tracked routes leaving Grand Rapids. The same hub also shows 11 mid-band and 4 challenged departures · fleet-wide on-time rank #1054 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to GRR–MDW.
Routes with a similar on-time rate
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.
On the multi-year calendar, GRR–MDW peaks in May at 91.9% on-time while August carries the heaviest traffic (~86 flights per month) ; the softest month is July at 78.4%, a 13.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does GRR to MDW rank among US routes by traffic? ▼
How often are flights delayed from GRR to MDW? ▼
What is the cancellation rate for GRR to MDW? ▼
How far is the flight from GRR to MDW? ▼
When is the best time to fly from GRR to MDW? ▼
Airports on this route
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.
Using GRR–MDW data
GRR–MDW runs 6.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare GRR and MDW airport profiles: delay causes and top routes differ even on the same corridor. GRR airport
- If your dates flex, May (91.9% on-time) beats July (78.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 85.5% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.