Colorado Springs (COS) to Denver (DEN): On-Time Performance
Data through July 2026
The calendar drives reliability on COS–DEN. December 2024 flights landed on schedule 92% of the time, but June 2025 dropped to 63% — a gap of 29 points. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 63%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 14
- last 12 months
- Duration
- 1h 2m
- scheduled
- Distance
- 73 mi
Best airline from COS to DEN
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 80% | 18 min | 1.4% | 6,972 |
| Southwest Airlines | 78% | 14 min | 0.4% | 2,362 |
| United Airlines | 73% | 23 min | 1.7% | 1,344 |
Monthly on-time trend
Best time to fly from COS to DEN
Aim for departures around 6 a.m. (89% on-time); avoid 5 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 17 min |
| Tuesdaybest | 79% | 16 min |
| Wednesday | 79% | 18 min |
| Thursday | 78% | 19 min |
| Friday | 76% | 19 min |
| Saturdaybest | 79% | 18 min |
| Sundaybest | 79% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft27%
- Airline operations36%
- National airspace system30%
- Weather8%
Frequently asked questions
- How often are flights from COS to DEN delayed?
- 21% of COS–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from COS to DEN?
- SkyWest Airlines has the best on-time record on this route at 80%, based on 6,972 flights. 3 airlines flew COS–DEN frequently enough to compare in this period.
- What is the best time of day to fly from COS to DEN?
- Departures around 6 a.m. have the best record (89% on-time), while departures around 5 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from COS to DEN?
- The scheduled COS–DEN flight time averages 1h 2m over 73 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are COS to DEN flights cancelled?
- 1.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from COS to DEN?
- June 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was December 2024 at 92%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 10,678 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.