Route
MDW → SDF
Chicago Midway International Airport Louisville Muhammad Ali International Airport
How punctual is this route?
- On-time arrivals
- 83.1%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 966
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 35%
- Air traffic control & airport 12%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.2% | 86 |
| October 2025 | 84.3% | 89 |
| November 2025 | 89.2% | 78 |
| December 2025 | 73.1% | 78 |
| January 2026 | 88.1% | 63 |
| February 2026 | 78.2% | 56 |
| March 2026 | 76.8% | 85 |
| April 2026 | 90.6% | 86 |
| May 2026 | 83.7% | 86 |
| June 2026 | 76.4% | 90 |
| July 2026 | 87.8% | 92 |
| August 2026 | 81.6% | 77 |
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 | 966 | 83.1% | 1.7% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN1267
7% late · 60 flights
-
WN1286
19% late · 59 flights
-
WN4971
25% late · 58 flights
-
WN833
2% late · 50 flights
-
WN3376
18% late · 49 flights
-
WN4597
32% late · 43 flights
-
WN1324
18% late · 33 flights
-
WN1678
31% late · 33 flights
-
WN1475
16% late · 31 flights
-
WN2316
13% late · 31 flights
-
WN3870
20% late · 30 flights
-
WN4931
11% late · 30 flights
-
WN4002
7% late · 28 flights
-
WN4473
15% late · 27 flights
-
WN3027
21% late · 24 flights
-
WN3374
17% late · 24 flights
-
WN680
13% late · 24 flights
-
WN1122
22% late · 23 flights
-
WN3168
14% late · 21 flights
-
WN2837
16% late · 20 flights
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