Route · SDF → MDW · 2020–2025 BTS data
Louisville to Chicago
The SDF–MDW corridor (Louisville, KY → Chicago, IL) runs ahead of the national average, served by 1 carrier across roughly 271 miles.
Data updated 2026-06-13
- 87.3%
- On-time
- +8.3 pts
- vs US avg
- 64 min
- Delay when late
- 5,739
- Flights
Cancelled
1.4%
Best Month
Sep 2025 94%
Worst Month
May 2024 76%
Distance
271 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 78 | 17 | 0 | 0 | WN |
| Nov 2025 | 78 | 7 | 5 | 0 | WN |
| Oct 2025 | 87 | 14 | 0 | 0 | WN |
| Sep 2025 | 86 | 5 | 0 | 0 | WN |
| Aug 2025 | 90 | 8 | 1 | 0 | WN |
| Jul 2025 | 104 | 22 | 5 | 0 | WN |
| Jun 2025 | 102 | 10 | 0 | 0 | WN |
| May 2025 | 88 | 9 | 1 | 0 | WN |
| Apr 2025 | 86 | 12 | 1 | 0 | WN |
| Mar 2025 | 80 | 14 | 0 | 0 | WN |
| Feb 2025 | 56 | 7 | 0 | 0 | WN |
| Jan 2025 | 64 | 11 | 2 | 0 | WN |
| Dec 2024 | 80 | 6 | 0 | 0 | WN |
| Nov 2024 | 81 | 9 | 0 | 0 | WN |
| Oct 2024 | 87 | 6 | 0 | 0 | WN |
| Sep 2024 | 85 | 9 | 0 | 0 | WN |
| Aug 2024 | 91 | 9 | 0 | 0 | WN |
| Jul 2024 | 104 | 19 | 2 | 0 | WN |
| Jun 2024 | 100 | 12 | 0 | 0 | WN |
| May 2024 | 89 | 21 | 1 | 0 | WN |
| Apr 2024 | 86 | 13 | 0 | 0 | WN |
| Mar 2024 | 86 | 10 | 0 | 0 | WN |
| Feb 2024 | 76 | 6 | 0 | 0 | WN |
| Jan 2024 | 89 | 12 | 10 | 1 | WN |
Cancellation Rate
1.4%
28 of 2,053 flights
Diversion Rate
0.0%
1 of 2,053 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
Origin airport →MDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See SDF and MDW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SDF–MDW.
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What the Data Says About SDF to MDW
Louisville to Chicago (SDF to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.3% on-time rate across 5,739 flights, with delays that do happen averaging 64.3 minutes. The corridor runs roughly 271 miles and is served by 1 carrier. Over the most recent 24 months, 28 of 2,053 flights were cancelled (1.4%) and 1 diverted (0.0%).
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 94% on-time, while May 2024 came in at just 76% - a 18-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SDF to MDW? ▼
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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.