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

Houston, TX (IAH) to Denver, CO (DEN) flight delay odds

80.8% of 4,673 official scheduled IAH-to-DEN flights arrived on time; 12.9% arrived at least 30 minutes late and 0.2% 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
80.8%arrived on time
12.9%30+ min late
0.2%cancelled
4,673scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.1%all scheduled flights
120+ minutes late2.8%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+3.7 mincompleted flights

Which departure time was most reliable for IAH to DEN?

Among qualifying IAH-to-DEN departure window results, Early morning had the highest on-time rate: 90.4% of 1,328 flights. Evening was lowest at 68.9% across 823 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,32890.4%5.1%0.1%
Late morning84884.7%10.3%0.2%
Afternoon1,16174.8%17.1%0.3%
Evening82368.9%22.0%0.4%
Night51381.9%12.9%0.4%

Which weekday was most reliable for IAH to DEN?

Among qualifying IAH-to-DEN weekday results, Tuesday had the highest on-time rate: 84.4% of 660 flights. Saturday was lowest at 78.9% across 662 flights.

DayFlightsOn time30+ minCancelled
Monday68080.0%14.6%0.4%
Tuesday66084.4%10.8%0.3%
Wednesday65082.3%11.5%0.2%
Thursday66880.8%13.0%0.0%
Friday67979.1%14.6%0.1%
Saturday66278.9%13.4%0.2%
Sunday67480.1%12.0%0.4%

Which airline was most reliable for IAH to DEN?

Among qualifying IAH-to-DEN airline results, United Airlines had the highest on-time rate: 81.1% of 3,875 flights. Frontier Airlines was lowest at 79.4% across 798 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines3,87581.1%12.8%0.2%
Frontier Airlines79879.4%13.0%0.4%

Which month was most reliable for IAH to DEN?

Among qualifying IAH-to-DEN month results, April 2026 had the highest on-time rate: 87.8% of 361 flights. June 2026 was lowest at 71.0% across 431 flights.

MonthFlightsOn time30+ minCancelled
July 202540271.4%20.4%0.0%
August 202540372.7%20.3%0.2%
September 202538381.7%11.0%0.3%
October 202539682.8%10.1%0.3%
November 202535782.9%10.4%0.0%
December 202539084.4%10.0%0.0%
January 202638587.0%7.0%0.3%
February 202634786.5%10.4%0.0%
March 202640681.0%13.8%1.5%
April 202636187.8%9.7%0.0%
May 202641283.0%10.0%0.0%
June 202643171.0%19.5%0.2%

What drove IAH to DEN delay minutes?

Late aircraft was the largest recorded IAH-to-DEN delay category, accounting for 38.9% of 61,525 BTS-attributed delay minutes during July 2025–June 2026.

Airline29.2%
Late aircraft38.9%
National airspace25.5%
Weather6.4%
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.