Denver (DEN) to Gillette (GCC): On-Time Performance
Data through May 2026
Denver (DEN) to Gillette (GCC) effectively runs on two schedules. In December 2024, 95% of arrivals were on time; in August 2025 that fell to 66% — a 30-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 1.9
- last 12 months
- Duration
- 1h 21m
- scheduled
- Distance
- 313 mi
Monthly on-time trend
Best time to fly from DEN to GCC
Aim for departures around 12 p.m. (85% on-time); avoid 9 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 13 min |
| Tuesday | 80% | 23 min |
| Wednesday | 82% | 24 min |
| Thursday | 75% | 18 min |
| Friday | 82% | 17 min |
| Saturdaybest | 85% | 13 min |
| Sunday | 79% | 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 aircraft34%
- Airline operations31%
- National airspace system19%
- Weather16%
Frequently asked questions
- How often are flights from DEN to GCC delayed?
- 19% of DEN–GCC 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 GCC?
- Departures around 12 p.m. have the best record (85% on-time), while departures around 9 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to GCC?
- The scheduled DEN–GCC flight time averages 1h 21m over 313 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are DEN to GCC flights cancelled?
- 1.4% 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 GCC?
- August 2025 was the roughest month in this dataset, with only 66% of arrivals on time. The best was December 2024 at 95%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 1,413 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.