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

Columbus, OH (CMH) to Houston, TX (IAH) flight delay odds

75.0% of 548 official scheduled CMH-to-IAH flights arrived on time; 16.2% arrived at least 30 minutes late and 1.1% 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
75.0%arrived on time
16.2%30+ min late
1.1%cancelled
548scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.9%all scheduled flights
120+ minutes late5.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+11.5 mincompleted flights

Which departure time was most reliable for CMH to IAH?

Among qualifying CMH-to-IAH departure window results, Early morning had the highest on-time rate: 83.3% of 354 flights. Evening was lowest at 56.3% across 119 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning35483.3%8.2%1.4%
Afternoon7565.3%26.7%0.0%
Evening11956.3%33.6%0.8%

Which weekday was most reliable for CMH to IAH?

Among qualifying CMH-to-IAH weekday results, Wednesday had the highest on-time rate: 80.0% of 80 flights. Sunday was lowest at 68.1% across 69 flights.

DayFlightsOn time30+ minCancelled
Monday8269.5%20.7%0.0%
Tuesday7878.2%15.4%3.8%
Wednesday8080.0%13.8%0.0%
Thursday8179.0%11.1%1.2%
Friday8771.3%16.1%0.0%
Saturday7178.9%16.9%0.0%
Sunday6968.1%20.3%2.9%

Which airline was most reliable for CMH to IAH?

Only United Airlines met the CMH-to-IAH airline threshold: 74.8% of 543 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines54374.8%16.4%1.1%
SkyWest Airlines5100.0%0.0%0.0%

Which month was most reliable for CMH to IAH?

Among qualifying CMH-to-IAH month results, April 2026 had the highest on-time rate: 93.3% of 30 flights. July 2025 was lowest at 60.4% across 53 flights.

MonthFlightsOn time30+ minCancelled
July 20255360.4%26.4%0.0%
August 20255369.8%22.6%1.9%
September 20255676.8%17.9%0.0%
October 20256279.0%12.9%0.0%
November 20255969.5%23.7%0.0%
December 20254261.9%23.8%0.0%
January 20263789.2%2.7%2.7%
February 20262892.9%3.6%0.0%
March 20265278.8%11.5%3.8%
April 20263093.3%0.0%0.0%
May 20263971.8%15.4%2.6%
June 20263773.0%18.9%2.7%

What drove CMH to IAH delay minutes?

Airline was the largest recorded CMH-to-IAH delay category, accounting for 35.4% of 11,738 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.4%
Late aircraft34.6%
National airspace26.7%
Weather3.3%
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.