Historical on-time performance
Bismarck to Denver
517 miData through May 2026Source: US DOT · BTS
Flights on BIS–DEN arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 1,536 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time76%Medianon timep9065 minCancel0.8%Flights1,536
Why flights run late
Delay causes
- Airline51%
- Weather6%
- Air traffic (NAS)22%
- Late aircraft20%
- Security1%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather75%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 12 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BIS → DEN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 85% on time.
- Middays85% on time · p90 30 min · 1,121 flights
- Mornings80% on time · p90 45 min · 1,831 flights
- Afternoons77% on time · p90 40 min · 166 flights · limited
- Evenings62% on time · p90 95 min · 988 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 79% on time.
- Wednesdays79% on time · p90 40 min · 589 flights
- Tuesdays78% on time · p90 50 min · 591 flights
- Mondays77% on time · p90 65 min · 591 flights
- Sundays76% on time · p90 60 min · 594 flights
- Saturdays76% on time · p90 55 min · 565 flights
- Fridays76% on time · p90 65 min · 592 flights
- Thursdays76% on time · p90 60 min · 588 flights
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