PlainFlights

Route · MCI → STL · 2020–2025 BTS data

Kansas City to St. Louis

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MCI to STL (Kansas City to St. Louis) ranks #2370 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

88.1%
On-time
+9.1 pts
vs US avg
55 min
Delay when late
5,319
Flights
#2370 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Oct 2024 99%

Worst Month

Jan 2024 77%

Distance

237 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 85 9 1 0 WN
Nov 2025 81 10 0 0 WN
Oct 2025 88 12 0 0 WN
Sep 2025 90 8 0 0 WN
Aug 2025 92 13 0 0 WN
Jul 2025 92 16 0 0 WN
Jun 2025 90 17 1 0 WN
May 2025 88 13 1 1 WN
Apr 2025 86 15 0 0 WN
Mar 2025 85 9 0 0 WN
Feb 2025 63 6 1 0 WN
Jan 2025 72 5 5 0 WN
Dec 2024 89 9 0 0 WN
Nov 2024 83 8 0 0 WN
Oct 2024 88 1 1 0 WN
Sep 2024 85 4 0 0 WN
Aug 2024 91 10 1 0 WN
Jul 2024 103 20 0 0 WN
Jun 2024 100 12 0 0 WN
May 2024 88 19 2 0 WN
Apr 2024 86 16 0 0 WN
Mar 2024 86 17 0 0 WN
Feb 2024 75 7 0 0 WN
Jan 2024 81 19 7 0 WN

MCI–STL seasonal on-time pattern

Best: February (92.8%) · weakest: June (84.6%)

84%86%88%90%92%94% JanFebMarAprMayJunJulAugSepOctNovDec 86.1%

Strongest calendar month

February

92.8% on-time · ~69 flights/mo

Busiest calendar month

July

~89 flights/mo avg

Weakest calendar month

June

84.6% on-time · ~81 flights/mo

Cancellation Rate

1.0%

20 of 2,067 flights

Diversion Rate

0.0%

1 of 2,067 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

MCI - Kansas City

Full on-time, delay-cause, and seasonal performance for Kansas City, MO.

MCI on-time profile

STL - St. Louis

Full on-time, delay-cause, and seasonal performance for St. Louis, MO.

STL on-time profile

Compare the two airports

See MCI and STL side by side on delays, cancellations, and reliability.

Compare MCI vs STL

Origin-hub reliability standing

Among MCI's stronger departures

MCI → STL posts a 88.1% on-time rate, landing in the ≥85% band with 14 of 39 BTS-tracked routes leaving Kansas City. The same hub also shows 25 mid-band and 0 challenged departures · fleet-wide on-time rank #406 of 4927 (highest on-time = #1).

What the Data Says About MCI to STL

Kansas City to St. Louis (MCI to STL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.1% on-time rate across 5,319 flights, with delays that do happen averaging 55.0 minutes. The corridor runs roughly 237 miles and is served by 1 carrier. Over the most recent 24 months, 20 of 2,067 flights were cancelled (1.0%) and 1 diverted (0.0%).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 99% on-time, while Jan 2024 came in at just 77% - a 22-point swing worth factoring into travel timing.

On the multi-year calendar, MCI–STL peaks in February at 92.8% on-time while July carries the heaviest traffic (~89 flights per month) ; the softest month is June at 84.6%, a 8.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does MCI to STL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, MCI to STL ranks #2370 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from MCI to STL? ▼
Flights from Kansas City to St. Louis have a 88.1% on-time rate based on 5,319 flights. The average delay is 55.0 minutes. The best recent month was Oct 2024 with 99% on-time.
What is the cancellation rate for MCI to STL? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (20 of 2,067 flights) and 0.0% were diverted.
How far is the flight from MCI to STL? ▼
The flight distance from Kansas City (MCI) to St. Louis (STL) is approximately 237 miles. This route is served by 1 carrier.
When is the best time to fly from MCI to STL? ▼
The best recent month for on-time performance was Oct 2024 (99% on-time). The worst was Jan 2024 (77% on-time). Consider booking during months with historically better performance.

Airports on this route

MCI Airport

Kansas City
STL Airport

St. Louis
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 MCI–STL data

MCI–STL runs 9.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare MCI and STL airport profiles: delay causes and top routes differ even on the same corridor. MCI airport
  • If your dates flex, February (92.8% on-time) beats June (84.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 88.1% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.