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

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

Historically, 79.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,251 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

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

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.