BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
CMH→STL

Columbus, OH (CMH) to St. Louis, MO (STL) flight delay odds

83.6% of 672 official scheduled CMH-to-STL flights arrived on time; 11.6% arrived at least 30 minutes late and 0.7% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
83.6%arrived on time
11.6%30+ min late
0.7%cancelled
672scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.4%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+2.1 mincompleted flights

Which departure time was most reliable for CMH to STL?

Among qualifying CMH-to-STL departure window results, Early morning had the highest on-time rate: 94.8% of 287 flights. Night was lowest at 64.8% across 54 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning28794.8%3.8%0.7%
Late morning5893.1%5.2%0.0%
Evening25273.8%18.7%1.2%
Night5464.8%22.2%0.0%

Which weekday was most reliable for CMH to STL?

Among qualifying CMH-to-STL weekday results, Wednesday had the highest on-time rate: 90.2% of 102 flights. Sunday was lowest at 77.5% across 102 flights.

DayFlightsOn time30+ minCancelled
Monday10579.0%17.1%1.0%
Tuesday10688.7%7.5%0.0%
Wednesday10290.2%7.8%0.0%
Thursday10283.3%9.8%0.0%
Friday10384.5%8.7%1.0%
Saturday5280.8%15.4%0.0%
Sunday10277.5%16.7%2.9%

Which airline was most reliable for CMH to STL?

Only Southwest Airlines met the CMH-to-STL airline threshold: 83.6% of 672 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines67283.6%11.6%0.7%

Which month was most reliable for CMH to STL?

Among qualifying CMH-to-STL month results, September 2025 had the highest on-time rate: 92.9% of 56 flights. July 2025 was lowest at 73.7% across 57 flights.

MonthFlightsOn time30+ minCancelled
July 20255773.7%17.5%0.0%
August 20255689.3%8.9%1.8%
September 20255692.9%5.4%1.8%
October 20255789.5%1.8%0.0%
November 20255485.2%11.1%0.0%
December 20255780.7%10.5%0.0%
January 20265784.2%7.0%5.3%
February 20265280.8%17.3%0.0%
March 20265874.1%22.4%0.0%
April 20265683.9%10.7%0.0%
May 20265682.1%16.1%0.0%
June 20265687.5%10.7%0.0%

What drove CMH to STL delay minutes?

Late aircraft was the largest recorded CMH-to-STL delay category, accounting for 65.6% of 6,984 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.7%
Late aircraft65.6%
National airspace6.1%
Weather1.6%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.