Historical on-time performance
Denver to Missoula
679 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–MSO arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.1%of scheduled flights
based on 1,047 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- SkyWest AirlinesOn-time80%Medianon timep9040 minCancel0.3%Flights324
- United AirlinesOn-time78%Medianon timep9045 minCancel0.0%Flights723
Why flights run late
Delay causes
- Airline35%
- Weather6%
- Air traffic (NAS)13%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DEN → MSO
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 313 flights
- Middays84% on time · p90 30 min · 1,658 flights
- Afternoons76% on time · p90 40 min · 353 flights
- Evenings68% on time · p90 70 min · 1,088 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 82% on time.
- Tuesdays82% on time · p90 30 min · 466 flights
- Thursdays80% on time · p90 40 min · 467 flights
- Wednesdays80% on time · p90 45 min · 493 flights
- Saturdays78% on time · p90 45 min · 477 flights
- Sundays77% on time · p90 45 min · 473 flights
- Mondays76% on time · p90 50 min · 521 flights
- Fridays76% on time · p90 55 min · 515 flights
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