Route · STL → MCI · 2020–2025 BTS data
St. Louis to Kansas City
The STL–MCI corridor (St. Louis, MO → Kansas City, MO) runs ahead of the national average, served by 1 carrier across roughly 237 miles.
Data updated 2026-06-13
- 79.2%
- On-time
- +0.2 pts
- vs US avg
- 54 min
- Delay when late
- 5,343
- Flights
Cancelled
0.9%
Best Month
Jan 2025 93%
Worst Month
Dec 2025 60%
Distance
237 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 85 | 34 | 1 | 0 | WN |
| Nov 2025 | 81 | 12 | 0 | 0 | WN |
| Oct 2025 | 88 | 20 | 0 | 0 | WN |
| Sep 2025 | 90 | 14 | 0 | 0 | WN |
| Aug 2025 | 92 | 21 | 1 | 0 | WN |
| Jul 2025 | 92 | 29 | 0 | 0 | WN |
| Jun 2025 | 90 | 22 | 0 | 1 | WN |
| May 2025 | 88 | 23 | 1 | 0 | WN |
| Apr 2025 | 86 | 17 | 0 | 0 | WN |
| Mar 2025 | 86 | 15 | 2 | 0 | WN |
| Feb 2025 | 71 | 13 | 0 | 0 | WN |
| Jan 2025 | 72 | 5 | 6 | 0 | WN |
| Dec 2024 | 89 | 21 | 0 | 0 | WN |
| Nov 2024 | 83 | 8 | 0 | 0 | WN |
| Oct 2024 | 88 | 9 | 0 | 0 | WN |
| Sep 2024 | 85 | 9 | 0 | 0 | WN |
| Aug 2024 | 91 | 14 | 0 | 0 | WN |
| Jul 2024 | 103 | 33 | 0 | 0 | WN |
| Jun 2024 | 99 | 28 | 0 | 0 | WN |
| May 2024 | 74 | 27 | 0 | 0 | WN |
| Apr 2024 | 77 | 23 | 0 | 0 | WN |
| Mar 2024 | 88 | 15 | 0 | 1 | WN |
| Feb 2024 | 83 | 17 | 0 | 0 | WN |
| Jan 2024 | 89 | 26 | 8 | 1 | WN |
Cancellation Rate
0.9%
19 of 2,070 flights
Diversion Rate
0.1%
3 of 2,070 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 →MCI - Kansas City
Full on-time, delay-cause, and seasonal performance for Kansas City, MO.
Destination airport →Compare the two airports
See STL and MCI 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–MCI.
Routes with a similar on-time rate
What the Data Says About STL to MCI
5,343 tracked flights put the STL to MCI pairing (St. Louis to Kansas City) at a 79.2% on-time rate, squarely in line with the wider network. Delays that do occur run 54.3 minutes on average. Across the 237-mile route and its 1 carrier, the trailing 24 months show 0.9% cancelled and 0.1% diverted (2,070 flights sampled).
The monthly split is wide on this route: Jan 2025 posted the strongest performance at 93% on-time, while Dec 2025 came in at just 60% - a 33-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.