Route · MDW → SDF · 2020–2025 BTS data
Chicago to Louisville
The MDW–SDF corridor (Chicago, IL → Louisville, KY) runs ahead of the national average, served by 1 carrier across roughly 271 miles.
Data updated 2026-06-13
- 79.3%
- On-time
- +0.3 pts
- vs US avg
- 58 min
- Delay when late
- 5,803
- Flights
Cancelled
1.0%
Best Month
Feb 2024 94%
Worst Month
Jul 2025 63%
Distance
271 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 78 | 21 | 0 | 0 | WN |
| Nov 2025 | 78 | 8 | 4 | 0 | WN |
| Oct 2025 | 89 | 14 | 0 | 0 | WN |
| Sep 2025 | 86 | 11 | 0 | 0 | WN |
| Aug 2025 | 89 | 16 | 0 | 0 | WN |
| Jul 2025 | 104 | 38 | 3 | 0 | WN |
| Jun 2025 | 102 | 29 | 0 | 0 | WN |
| May 2025 | 89 | 14 | 0 | 0 | WN |
| Apr 2025 | 85 | 16 | 0 | 0 | WN |
| Mar 2025 | 80 | 16 | 1 | 0 | WN |
| Feb 2025 | 56 | 12 | 0 | 0 | WN |
| Jan 2025 | 65 | 13 | 2 | 0 | WN |
| Dec 2024 | 80 | 19 | 0 | 0 | WN |
| Nov 2024 | 81 | 7 | 0 | 0 | WN |
| Oct 2024 | 88 | 8 | 0 | 0 | WN |
| Sep 2024 | 85 | 18 | 0 | 0 | WN |
| Aug 2024 | 91 | 15 | 0 | 0 | WN |
| Jul 2024 | 104 | 34 | 2 | 0 | WN |
| Jun 2024 | 100 | 30 | 0 | 0 | WN |
| May 2024 | 90 | 18 | 0 | 0 | WN |
| Apr 2024 | 86 | 14 | 0 | 0 | WN |
| Mar 2024 | 87 | 19 | 0 | 0 | WN |
| Feb 2024 | 79 | 5 | 0 | 0 | WN |
| Jan 2024 | 86 | 19 | 8 | 0 | WN |
Cancellation Rate
1.0%
20 of 2,058 flights
Diversion Rate
0.0%
0 of 2,058 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Origin airport →SDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
Destination airport →Compare the two airports
See MDW and SDF side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to MDW–SDF.
Routes with a similar on-time rate
What the Data Says About MDW to SDF
5,803 tracked flights put the MDW to SDF pairing (Chicago to Louisville) at a 79.3% on-time rate, squarely in line with the wider network. Delays that do occur run 57.8 minutes on average. Across the 271-mile route and its 1 carrier, the trailing 24 months show 1.0% cancelled and 0.0% diverted (2,058 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 94% on-time, while Jul 2025 came in at just 63% - a 30-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from MDW to SDF? ▼
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Flight Guides
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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.