Route · STL → MKE · 2020–2025 BTS data
St. Louis to Milwaukee
The STL–MKE corridor (St. Louis, MO → Milwaukee, WI) runs ahead of the national average, served by 1 carrier across roughly 317 miles.
Data updated 2026-06-13
- 82.9%
- On-time
- +3.9 pts
- vs US avg
- 62 min
- Delay when late
- 3,592
- Flights
Cancelled
1.0%
Best Month
Sep 2024 93%
Worst Month
Jan 2024 68%
Distance
317 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 58 | 12 | 0 | 0 | WN |
| Nov 2025 | 54 | 12 | 1 | 0 | WN |
| Oct 2025 | 57 | 8 | 0 | 0 | WN |
| Sep 2025 | 60 | 8 | 0 | 0 | WN |
| Aug 2025 | 60 | 7 | 1 | 0 | WN |
| Jul 2025 | 57 | 12 | 0 | 0 | WN |
| Jun 2025 | 55 | 6 | 0 | 0 | WN |
| May 2025 | 53 | 5 | 0 | 0 | WN |
| Apr 2025 | 52 | 9 | 0 | 0 | WN |
| Mar 2025 | 54 | 4 | 0 | 0 | WN |
| Feb 2025 | 53 | 9 | 1 | 0 | WN |
| Jan 2025 | 58 | 11 | 3 | 0 | WN |
| Dec 2024 | 58 | 6 | 0 | 0 | WN |
| Nov 2024 | 54 | 4 | 0 | 1 | WN |
| Oct 2024 | 58 | 4 | 2 | 0 | WN |
| Sep 2024 | 60 | 4 | 0 | 0 | WN |
| Aug 2024 | 61 | 8 | 2 | 1 | WN |
| Jul 2024 | 57 | 14 | 0 | 1 | WN |
| Jun 2024 | 54 | 10 | 0 | 0 | WN |
| May 2024 | 54 | 14 | 0 | 0 | WN |
| Apr 2024 | 52 | 10 | 0 | 0 | WN |
| Mar 2024 | 53 | 13 | 0 | 0 | WN |
| Feb 2024 | 54 | 10 | 0 | 0 | WN |
| Jan 2024 | 59 | 19 | 4 | 0 | WN |
Cancellation Rate
1.0%
14 of 1,345 flights
Diversion Rate
0.2%
3 of 1,345 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Origin airport →MKE - Milwaukee
Full on-time, delay-cause, and seasonal performance for Milwaukee, WI.
Destination airport →Compare the two airports
See STL and MKE side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to STL–MKE.
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What the Data Says About STL to MKE
Bureau of Transportation Statistics records show St. Louis to Milwaukee (STL to MKE) running a 82.9% on-time rate over 3,592 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 62.0 minutes. The 317-mile corridor is served by 1 carrier, and over the last 24 months 1.0% of 1,345 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 93% on-time, while Jan 2024 came in at just 68% - a 26-point swing worth factoring into travel timing.
Frequently Asked Questions
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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.