Route
GRR → MDW
Gerald R. Ford International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 79.2%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 932
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 30%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 69.8% | 86 |
| October 2025 | 86.4% | 88 |
| November 2025 | 78.9% | 59 |
| December 2025 | 69.5% | 60 |
| January 2026 | 79.0% | 62 |
| February 2026 | 79.6% | 56 |
| March 2026 | 78.0% | 85 |
| April 2026 | 82.6% | 86 |
| May 2026 | 83.9% | 87 |
| June 2026 | 70.9% | 86 |
| July 2026 | 79.5% | 89 |
| August 2026 | 88.6% | 88 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 932 | 79.2% | 0.4% | 50 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN2828
17% late · 64 flights
-
WN1894
2% late · 60 flights
-
WN1399
22% late · 58 flights
-
WN2237
16% late · 58 flights
-
WN2194
26% late · 57 flights
-
WN4375
4% late · 49 flights
-
WN1895
11% late · 36 flights
-
WN1539
66% late · 35 flights
-
WN3017
27% late · 33 flights
-
WN3238
17% late · 33 flights
-
WN2463
45% late · 31 flights
-
WN329
16% late · 31 flights
-
WN949
13% late · 31 flights
-
WN1770
14% late · 30 flights
-
WN1826
4% late · 28 flights
-
WN2434
25% late · 28 flights
-
WN4400
25% late · 28 flights
-
WN2826
38% late · 27 flights
-
WN724
4% late · 25 flights
-
WN2709
17% late · 23 flights
-
WN2806
5% late · 21 flights
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