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

Colorado Springs, CO (COS) to Chicago, IL (ORD) flight delay odds

72.5% of 1,001 official scheduled COS-to-ORD flights arrived on time; 18.0% arrived at least 30 minutes late and 1.9% 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
72.5%arrived on time
18.0%30+ min late
1.9%cancelled
1,001scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.7%all scheduled flights
120+ minutes late5.7%all scheduled flights
Diverted0.9%did not reach as scheduled
Average arrival+19.0 mincompleted flights

Which departure time was most reliable for COS to ORD?

Among qualifying COS-to-ORD departure window results, Early morning had the highest on-time rate: 87.2% of 195 flights. Afternoon was lowest at 65.8% across 591 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning19587.2%6.7%1.0%
Late morning21577.7%14.4%1.4%
Afternoon59165.8%23.0%2.4%

Which weekday was most reliable for COS to ORD?

Among qualifying COS-to-ORD weekday results, Saturday had the highest on-time rate: 79.0% of 143 flights. Sunday was lowest at 67.1% across 143 flights.

DayFlightsOn time30+ minCancelled
Monday14468.1%21.5%1.4%
Tuesday14677.4%17.1%0.7%
Wednesday14171.6%19.9%2.1%
Thursday14174.5%14.9%2.1%
Friday14369.9%15.4%2.8%
Saturday14379.0%12.6%3.5%
Sunday14367.1%24.5%0.7%

Which airline was most reliable for COS to ORD?

Among qualifying COS-to-ORD airline results, United Airlines had the highest on-time rate: 78.3% of 180 flights. SkyWest Airlines was lowest at 71.3% across 821 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines82171.3%19.2%2.1%
United Airlines18078.3%12.2%1.1%

Which month was most reliable for COS to ORD?

Among qualifying COS-to-ORD month results, May 2026 had the highest on-time rate: 83.0% of 94 flights. March 2026 was lowest at 58.1% across 62 flights.

MonthFlightsOn time30+ minCancelled
July 20259364.5%23.7%1.1%
August 20259375.3%11.8%1.1%
September 20259077.8%10.0%1.1%
October 20259380.6%14.0%0.0%
November 20258876.1%14.8%3.4%
December 20259072.2%22.2%0.0%
January 20266764.2%25.4%1.5%
February 20265667.9%17.9%0.0%
March 20266258.1%33.9%4.8%
April 20268575.3%17.6%1.2%
May 20269483.0%10.6%1.1%
June 20269066.7%21.1%7.8%

What drove COS to ORD delay minutes?

Airline was the largest recorded COS-to-ORD delay category, accounting for 49.5% of 27,650 BTS-attributed delay minutes during July 2025–June 2026.

Airline49.5%
Late aircraft27.7%
National airspace18.7%
Weather4.0%
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.