Denver (DEN) to Gillette (GCC): On-Time Performance
Data through July 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 80% on-time against a national 78%.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 2.0
- 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 7 a.m. (94% on-time); avoid 7 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 14 min |
| Tuesday | 78% | 23 min |
| Wednesday | 83% | 25 min |
| Thursday | 73% | 20 min |
| Friday | 81% | 16 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 aircraft35%
- Airline operations33%
- National airspace system17%
- Weather15%
Frequently asked questions
- How often are flights from DEN to GCC delayed?
- 20% of DEN–GCC 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.
- What is the best time of day to fly from DEN to GCC?
- Departures around 7 a.m. have the best record (94% on-time), while departures around 7 p.m. have the worst (69%). 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 20% of the time.
- How often are DEN to GCC flights cancelled?
- 1.3% 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 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 1,519 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.