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

Colorado Springs, CO (COS) to Denver, CO (DEN) flight delay odds

77.8% of 5,038 official scheduled COS-to-DEN flights arrived on time; 13.5% arrived at least 30 minutes late and 1.3% 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
77.8%arrived on time
13.5%30+ min late
1.3%cancelled
5,038scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.8%all scheduled flights
120+ minutes late3.3%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+5.4 mincompleted flights

Which departure time was most reliable for COS to DEN?

Among qualifying COS-to-DEN departure window results, Early morning had the highest on-time rate: 87.3% of 1,756 flights. Evening was lowest at 57.6% across 794 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,75687.3%6.9%0.7%
Late morning1,28481.1%11.1%0.9%
Afternoon1,20473.7%16.9%1.3%
Evening79457.6%26.6%3.5%

Which weekday was most reliable for COS to DEN?

Among qualifying COS-to-DEN weekday results, Sunday had the highest on-time rate: 80.3% of 752 flights. Friday was lowest at 73.9% across 727 flights.

DayFlightsOn time30+ minCancelled
Monday72376.9%13.4%1.2%
Tuesday69479.7%11.1%0.9%
Wednesday70777.7%14.6%0.8%
Thursday72076.2%15.0%1.1%
Friday72773.9%16.6%2.2%
Saturday71579.7%12.3%1.5%
Sunday75280.3%11.3%1.5%

Which airline was most reliable for COS to DEN?

Among qualifying COS-to-DEN airline results, SkyWest Airlines had the highest on-time rate: 79.9% of 3,282 flights. United Airlines was lowest at 72.0% across 614 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines3,28279.9%12.1%1.7%
Southwest Airlines1,14274.7%14.5%0.4%
United Airlines61472.0%18.9%1.3%

Which month was most reliable for COS to DEN?

Among qualifying COS-to-DEN month results, May 2026 had the highest on-time rate: 85.0% of 426 flights. July 2025 was lowest at 61.2% across 466 flights.

MonthFlightsOn time30+ minCancelled
July 202546661.2%23.8%2.8%
August 202546667.0%21.7%0.4%
September 202544380.4%11.5%0.2%
October 202545079.6%12.9%0.0%
November 202542679.1%7.0%8.2%
December 202544177.1%14.3%1.1%
January 202638982.3%9.0%1.3%
February 202634684.4%11.3%0.0%
March 202638879.4%13.1%1.0%
April 202636284.8%9.7%0.0%
May 202642685.0%10.1%0.2%
June 202643578.4%14.3%0.2%

What drove COS to DEN delay minutes?

National airspace was the largest recorded COS-to-DEN delay category, accounting for 32.6% of 74,271 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.3%
Late aircraft29.4%
National airspace32.6%
Weather7.7%
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.