Denver (DEN) to Casper (CPR): On-Time Performance
Data through May 2026
The calendar drives reliability on DEN–CPR. December 2024 flights landed on schedule 91% of the time, but June 2025 dropped to 62% — a gap of 29 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 73%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 7.0
- last 12 months
- Duration
- 1h 13m
- scheduled
- Distance
- 230 mi
Monthly on-time trend
Best time to fly from DEN to CPR
Aim for departures around 9 a.m. (84% on-time); avoid 5 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 16 min |
| Tuesdaybest | 81% | 15 min |
| Wednesday | 80% | 18 min |
| Thursday | 76% | 23 min |
| Friday | 74% | 22 min |
| Saturday | 78% | 17 min |
| Sunday | 76% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations38%
- National airspace system20%
- Weather7%
Frequently asked questions
- How often are flights from DEN to CPR delayed?
- 23% of DEN–CPR flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- What is the best time of day to fly from DEN to CPR?
- Departures around 9 a.m. have the best record (84% on-time), while departures around 5 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to CPR?
- The scheduled DEN–CPR flight time averages 1h 13m over 230 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are DEN to CPR flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to CPR?
- June 2025 was the roughest month in this dataset, with only 62% of arrivals on time. The best was December 2024 at 91%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 4,788 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.