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

Chicago, IL (ORD) to Denver, CO (DEN) flight delay odds

73.0% of 6,169 official scheduled ORD-to-DEN flights arrived on time; 17.7% arrived at least 30 minutes late and 1.2% 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 SIGNALGenerally reliable
73.0%arrived on time
17.7%30+ min late
1.2%cancelled
6,169scheduled 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 late4.3%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+12.7 mincompleted flights

Which departure time was most reliable for ORD to DEN?

Among qualifying ORD-to-DEN departure window results, Early morning had the highest on-time rate: 84.9% of 1,571 flights. Evening was lowest at 58.5% across 1,244 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,57184.9%9.2%1.0%
Late morning86977.4%14.4%0.7%
Afternoon2,00273.0%17.8%0.9%
Evening1,24458.5%27.9%2.1%
Night48364.2%24.2%2.3%

Which weekday was most reliable for ORD to DEN?

Among qualifying ORD-to-DEN weekday results, Tuesday had the highest on-time rate: 78.0% of 882 flights. Sunday was lowest at 70.1% across 903 flights.

DayFlightsOn time30+ minCancelled
Monday89670.2%20.9%1.8%
Tuesday88278.0%14.6%0.6%
Wednesday86074.0%16.3%0.6%
Thursday89672.3%18.2%1.0%
Friday90171.7%18.1%1.6%
Saturday83175.3%16.5%1.3%
Sunday90370.1%18.8%1.8%

Which airline was most reliable for ORD to DEN?

Among qualifying ORD-to-DEN airline results, United Airlines had the highest on-time rate: 76.5% of 3,758 flights. American Airlines was lowest at 65.1% across 1,471 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines3,75876.5%14.9%0.9%
American Airlines1,47165.1%24.1%1.8%
Southwest Airlines48371.6%17.4%1.7%
Frontier Airlines33270.8%21.1%2.1%
Envoy Air12576.0%16.0%0.0%

Which month was most reliable for ORD to DEN?

Among qualifying ORD-to-DEN month results, September 2025 had the highest on-time rate: 80.0% of 605 flights. July 2025 was lowest at 63.5% across 583 flights.

MonthFlightsOn time30+ minCancelled
July 202558363.5%25.0%2.9%
August 202559871.1%17.7%1.5%
September 202560580.0%13.6%0.2%
October 202561678.4%12.0%0.2%
November 202542372.1%17.7%3.5%
December 202541764.7%25.2%0.7%
January 202639474.6%17.8%0.3%
February 202643279.4%13.4%0.0%
March 202648569.3%22.5%2.7%
April 202649473.9%15.2%2.0%
May 202658477.9%14.0%0.0%
June 202653869.9%19.9%1.1%

What drove ORD to DEN delay minutes?

Late aircraft was the largest recorded ORD-to-DEN delay category, accounting for 46.4% of 120,275 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.1%
Late aircraft46.4%
National airspace21.9%
Weather4.4%
Security0.2%
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.