Route
SDF → MDW
Louisville Muhammad Ali International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 84.1%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 976
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Air traffic control & airport 29%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 94.2% | 86 |
| October 2025 | 83.9% | 87 |
| November 2025 | 90.4% | 78 |
| December 2025 | 78.2% | 78 |
| January 2026 | 85.0% | 63 |
| February 2026 | 94.6% | 56 |
| March 2026 | 77.1% | 85 |
| April 2026 | 80.2% | 87 |
| May 2026 | 84.3% | 85 |
| June 2026 | 81.0% | 90 |
| July 2026 | 83.5% | 92 |
| August 2026 | 80.7% | 89 |
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 | 976 | 84.1% | 1.6% | 67 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3484
7% late · 58 flights
-
WN3610
24% late · 52 flights
-
WN1096
10% late · 50 flights
-
WN300
19% late · 49 flights
-
WN2497
16% late · 46 flights
-
WN1683
24% late · 42 flights
-
WN1910
15% late · 41 flights
-
WN1407
10% late · 39 flights
-
WN3609
3% late · 36 flights
-
WN2035
27% late · 33 flights
-
WN3146
12% late · 33 flights
-
WN3671
0% late · 31 flights
-
WN1935
10% late · 30 flights
-
WN3522
11% late · 28 flights
-
WN3329
8% late · 27 flights
-
WN2816
4% late · 25 flights
-
WN3145
17% late · 24 flights
-
WN4503
20% late · 20 flights
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