Jamestown (JMS) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on JMS–DEN. November 2025 flights landed on schedule 96% of the time, but July 2025 dropped to 65% — a gap of 31 points. Across the full period the route averages 80% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 70%), which matters most in the rough months.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 2.7%
- Flights/day
- 1.7
- last 12 months
- Duration
- 2h 1m
- scheduled
- Distance
- 573 mi
Monthly on-time trend
Best time to fly from JMS to DEN
Aim for departures around 11 a.m. (89% on-time); avoid 6 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 23 min |
| Tuesday | 69% | 24 min |
| Wednesdaybest | 86% | 14 min |
| Thursday | 80% | 21 min |
| Friday | 79% | 22 min |
| Saturday | 74% | 32 min |
| Sunday | 85% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations28%
- National airspace system25%
- Weather15%
Frequently asked questions
- How often are flights from JMS to DEN delayed?
- 20% of JMS–DEN 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 20 minutes.
- What is the best time of day to fly from JMS to DEN?
- Departures around 11 a.m. have the best record (89% on-time), while departures around 6 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 JMS to DEN?
- The scheduled JMS–DEN flight time averages 2h 1m over 573 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are JMS to DEN flights cancelled?
- 2.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from JMS to DEN?
- July 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was November 2025 at 96%. If your dates are flexible, that 31-point gap is worth planning around.
Explore related pages
Based on 911 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.