Denver (DEN) to Bismarck/Mandan (BIS): On-Time Performance
Data through May 2026
The calendar drives reliability on DEN–BIS. October 2024 flights landed on schedule 95% of the time, but January 2025 dropped to 61% — a gap of 34 points. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 71%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 4.2
- last 12 months
- Duration
- 1h 50m
- scheduled
- Distance
- 516 mi
Monthly on-time trend
Best time to fly from DEN to BIS
Aim for departures around 9 a.m. (85% on-time); avoid 6 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 22 min |
| Tuesday | 80% | 20 min |
| Wednesdaybest | 81% | 22 min |
| Thursday | 74% | 21 min |
| Friday | 76% | 18 min |
| Saturday | 78% | 20 min |
| Sunday | 73% | 23 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 operations40%
- National airspace system18%
- Weather8%
Frequently asked questions
- How often are flights from DEN to BIS delayed?
- 24% of DEN–BIS 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 21 minutes.
- What is the best time of day to fly from DEN to BIS?
- Departures around 9 a.m. have the best record (85% on-time), while departures around 6 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to BIS?
- The scheduled DEN–BIS flight time averages 1h 50m over 516 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are DEN to BIS 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 BIS?
- January 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was October 2024 at 95%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 2,931 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.