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

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

Historically, 80.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 4,673 flights.

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

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 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%

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
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%

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
United Airlines3,87581.1%12.8%0.2%
Frontier Airlines79879.4%13.0%0.4%

Monthly trend

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

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 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.

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.