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Route · CMH → STL · 2020–2025 BTS data

Columbus to St. Louis

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), CMH to STL (Columbus to St. Louis) ranks #3328 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.5%
On-time
+5.5 pts
vs US avg
60 min
Delay when late
2,934
Flights
#3328 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Sep 2025 95%

Worst Month

May 2024 65%

Distance

409 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 57 11 0 0 WN
Nov 2025 54 8 0 0 WN
Oct 2025 57 6 0 0 WN
Sep 2025 56 3 1 0 WN
Aug 2025 56 5 1 0 WN
Jul 2025 57 15 0 0 WN
Jun 2025 56 11 0 0 WN
May 2025 56 9 0 0 WN
Apr 2025 55 10 0 0 WN
Mar 2025 53 9 0 1 WN
Feb 2025 52 6 1 0 WN
Jan 2025 58 5 4 1 WN
Dec 2024 58 12 0 0 WN
Nov 2024 54 5 0 0 WN
Oct 2024 58 4 1 0 WN
Sep 2024 55 4 0 0 WN
Aug 2024 57 8 1 0 WN
Jul 2024 57 15 0 0 WN
Jun 2024 54 12 0 0 WN
May 2024 54 19 0 0 WN
Apr 2024 52 10 0 0 WN
Mar 2024 52 11 0 0 WN
Feb 2024 50 5 0 0 WN
Jan 2024 55 8 6 0 WN

CMH–STL seasonal on-time pattern

Best: October (90.6%) · weakest: May (73.9%)

70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 85.9%

Strongest calendar month

October

90.6% on-time · ~56 flights/mo

Busiest calendar month

January

~56 flights/mo avg

Weakest calendar month

May

73.9% on-time · ~55 flights/mo

Cancellation Rate

1.1%

15 of 1,323 flights

Diversion Rate

0.2%

2 of 1,323 flights

Explore origin & destination

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

CMH - Columbus

Full on-time, delay-cause, and seasonal performance for Columbus, OH.

CMH 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 CMH and STL side by side on delays, cancellations, and reliability.

Compare CMH vs STL

Origin-hub reliability standing

Mid-pack among CMH departures

From CMH, this corridor sits with 19 other 75–85% on-time routes out of 33 tracked departures, not the hub's reliability leaders (13 at ≥85%) and not the softest ( 1 below 75%). Destination: St. Louis · fleet on-time rank #1393 of 4927.

What the Data Says About CMH to STL

Bureau of Transportation Statistics records show Columbus to St. Louis (CMH to STL) running a 84.5% on-time rate over 2,934 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 59.9 minutes. The 409-mile corridor is served by 1 carrier, and over the last 24 months 1.1% of 1,323 flights were cancelled, 0.2% diverted.

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 95% on-time, while May 2024 came in at just 65% - a 30-point swing worth factoring into travel timing.

On the multi-year calendar, CMH–STL peaks in October at 90.6% on-time while January carries the heaviest traffic (~56 flights per month) ; the softest month is May at 73.9%, a 16.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does CMH to STL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, CMH to STL ranks #3328 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 CMH to STL? ▼
Flights from Columbus to St. Louis have a 84.5% on-time rate based on 2,934 flights. The average delay is 59.9 minutes. The best recent month was Sep 2025 with 95% on-time.
What is the cancellation rate for CMH to STL? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (15 of 1,323 flights) and 0.2% were diverted.
How far is the flight from CMH to STL? ▼
The flight distance from Columbus (CMH) to St. Louis (STL) is approximately 409 miles. This route is served by 1 carrier.
When is the best time to fly from CMH to STL? ▼
The best recent month for on-time performance was Sep 2025 (95% on-time). The worst was May 2024 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

CMH Airport

Columbus
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 CMH–STL data

CMH–STL runs 5.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare CMH and STL airport profiles: delay causes and top routes differ even on the same corridor. CMH airport
  • If your dates flex, October (90.6% on-time) beats May (73.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.5% 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.