Historical on-time performance
Denver to Billings
455 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–BIL arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 1,813 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-time76%Medianon timep9040 minCancel1.7%Flights1,084
- United AirlinesOn-time74%Medianon timep9055 minCancel0.1%Flights729
Why flights run late
Delay causes
- Airline34%
- Weather3%
- Air traffic (NAS)13%
- Late aircraft50%
- 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 → BIL
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 — 84% on time.
- Mornings84% on time · p90 20 min · 614 flights
- Middays77% on time · p90 45 min · 1,213 flights
- Overnights76% on time · p90 55 min · 422 flights
- Afternoons75% on time · p90 40 min · 871 flights
- Evenings70% on time · p90 70 min · 1,086 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 78% on time.
- Wednesdays78% on time · p90 50 min · 597 flights
- Tuesdays78% on time · p90 40 min · 591 flights
- Sundays77% on time · p90 45 min · 611 flights
- Fridays75% on time · p90 45 min · 604 flights
- Saturdays74% on time · p90 50 min · 591 flights
- Mondays74% on time · p90 60 min · 612 flights
- Thursdays73% on time · p90 50 min · 600 flights
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