Route · STL → MCI · 2020–2025 BTS data
St. Louis to Kansas City
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), STL to MCI (St. Louis to Kansas City) ranks #2360 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 79.2%
- On-time
- +0.2 pts
- vs US avg
- 54 min
- Delay when late
- 5,343
- Flights
- #2360 of 4927
- Corpus placement
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 |
STL–MCI seasonal on-time pattern
Best: February (86.6%) · weakest: June (70.4%)
Strongest calendar month
February
86.6% on-time · ~74 flights/mo
Busiest calendar month
July
~88 flights/mo avg
Weakest calendar month
June
70.4% on-time · ~81 flights/mo
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.
STL on-time profileMCI - Kansas City
Full on-time, delay-cause, and seasonal performance for Kansas City, MO.
MCI on-time profileCompare the two airports
See STL and MCI side by side on delays, cancellations, and reliability.
Compare STL vs MCIOrigin-hub reliability standing
Mid-pack among STL departures
From STL, this corridor sits with 45 other 75–85% on-time routes out of 51 tracked departures, not the hub's reliability leaders (5 at ≥85%) and not the softest ( 1 below 75%). Destination: Kansas City · fleet on-time rank #3458 of 4927.
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.
On the multi-year calendar, STL–MCI peaks in February at 86.6% on-time while July carries the heaviest traffic (~88 flights per month) ; the softest month is June at 70.4%, a 16.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does STL to MCI rank among US routes by traffic? ▼
How often are flights delayed from STL to MCI? ▼
What is the cancellation rate for STL to MCI? ▼
How far is the flight from STL to MCI? ▼
When is the best time to fly from STL to MCI? ▼
Airports on this route
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.
Using STL–MCI data
STL–MCI is mid-pack at 79.2% on-time; month and carrier mix move more than the corridor headline.
- Compare STL and MCI airport profiles: delay causes and top routes differ even on the same corridor. STL airport
- If your dates flex, February (86.6% on-time) beats June (70.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 79.2% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.