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

Colorado Springs, CO (COS) to Atlanta, GA (ATL) flight delay odds

87.3% of 584 official scheduled COS-to-ATL flights arrived on time; 6.7% 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
87.3%arrived on time
6.7%30+ min late
1.9%cancelled
584scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.6%all scheduled flights
120+ minutes late1.9%all scheduled flights
Diverted1.2%did not reach as scheduled
Average arrival-6.0 mincompleted flights

Which departure time was most reliable for COS to ATL?

Among qualifying COS-to-ATL departure window results, Early morning had the highest on-time rate: 92.1% of 254 flights. Afternoon was lowest at 83.6% across 330 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning25492.1%4.3%1.6%
Afternoon33083.6%8.5%2.1%

Which weekday was most reliable for COS to ATL?

Among qualifying COS-to-ATL weekday results, Thursday had the highest on-time rate: 95.3% of 86 flights. Saturday was lowest at 76.7% across 60 flights.

DayFlightsOn time30+ minCancelled
Monday9181.3%12.1%2.2%
Tuesday8887.5%4.5%1.1%
Wednesday8591.8%3.5%0.0%
Thursday8695.3%1.2%1.2%
Friday8693.0%1.2%2.3%
Saturday6076.7%13.3%6.7%
Sunday8883.0%12.5%1.1%

Which airline was most reliable for COS to ATL?

Only Delta Air Lines met the COS-to-ATL airline threshold: 87.3% of 584 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines58487.3%6.7%1.9%

Which month was most reliable for COS to ATL?

Among qualifying COS-to-ATL month results, October 2025 had the highest on-time rate: 96.3% of 54 flights. January 2026 was lowest at 74.2% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20255786.0%7.0%0.0%
August 20255485.2%7.4%3.7%
September 20254995.9%2.0%0.0%
October 20255496.3%1.9%1.9%
November 20255286.5%7.7%3.8%
December 20253381.8%6.1%3.0%
January 20263174.2%12.9%6.5%
February 20262892.9%3.6%0.0%
March 20265180.4%13.7%2.0%
April 20265683.9%12.5%1.8%
May 20265988.1%3.4%1.7%
June 20266091.7%3.3%0.0%

What drove COS to ATL delay minutes?

Airline was the largest recorded COS-to-ATL delay category, accounting for 56.7% of 5,000 BTS-attributed delay minutes during July 2025–June 2026.

Airline56.7%
Late aircraft35.6%
National airspace4.7%
Weather3.0%
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.