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

Columbus, OH (CMH) to Chicago, IL (MDW) flight delay odds

79.6% of 1,251 official scheduled CMH-to-MDW flights arrived on time; 11.7% arrived at least 30 minutes late and 1.4% 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 SIGNALGenerally reliable
79.6%arrived on time
11.7%30+ min late
1.4%cancelled
1,251scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+5.6 mincompleted flights

Which departure time was most reliable for CMH to MDW?

Among qualifying CMH-to-MDW departure window results, Late morning had the highest on-time rate: 91.5% of 153 flights. Evening was lowest at 68.4% across 370 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning34288.9%5.0%1.8%
Late morning15391.5%3.9%1.3%
Afternoon37178.7%12.4%1.6%
Evening37068.4%19.5%0.8%

Which weekday was most reliable for CMH to MDW?

Among qualifying CMH-to-MDW weekday results, Tuesday had the highest on-time rate: 88.0% of 183 flights. Sunday was lowest at 69.9% across 193 flights.

DayFlightsOn time30+ minCancelled
Monday18875.0%14.9%1.1%
Tuesday18388.0%8.7%1.1%
Wednesday17687.5%6.8%0.6%
Thursday18481.5%9.8%1.1%
Friday18978.3%12.2%1.1%
Saturday13877.5%12.3%3.6%
Sunday19369.9%16.6%2.1%

Which airline was most reliable for CMH to MDW?

Only Southwest Airlines met the CMH-to-MDW airline threshold: 79.6% of 1,251 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,25179.6%11.7%1.4%

Which month was most reliable for CMH to MDW?

Among qualifying CMH-to-MDW month results, September 2025 had the highest on-time rate: 93.9% of 115 flights. March 2026 was lowest at 62.9% across 89 flights.

MonthFlightsOn time30+ minCancelled
July 202513171.0%18.3%0.8%
August 202512190.1%5.8%0.0%
September 202511593.9%3.5%0.0%
October 202511984.9%5.9%0.0%
November 202510380.6%7.8%3.9%
December 202510673.6%19.8%0.0%
January 20269074.4%7.8%5.6%
February 20268379.5%14.5%2.4%
March 20268962.9%20.2%4.5%
April 20268980.9%16.9%0.0%
May 20269281.5%10.9%0.0%
June 202611377.9%11.5%1.8%

What drove CMH to MDW delay minutes?

Late aircraft was the largest recorded CMH-to-MDW delay category, accounting for 57.5% of 14,057 BTS-attributed delay minutes during July 2025–June 2026.

Airline17.2%
Late aircraft57.5%
National airspace23.7%
Weather1.5%
Security0.1%
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.