Historical on-time performance
Denver to Helena
594 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–HLN arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 884 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time72%Medianon timep9080 minCancel1.5%Flights884
Why flights run late
Delay causes
- Airline29%
- Weather10%
- Air traffic (NAS)23%
- Late aircraft37%
- 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 → HLN
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 81% on time.
- Middays81% on time · p90 35 min · 941 flights
- Afternoons75% on time · p90 45 min · 155 flights · limited
- Evenings74% on time · p90 70 min · 1,080 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 83% on time.
- Wednesdays83% on time · p90 40 min · 314 flights
- Tuesdays79% on time · p90 45 min · 314 flights
- Saturdays78% on time · p90 45 min · 310 flights
- Sundays76% on time · p90 50 min · 314 flights
- Fridays75% on time · p90 45 min · 313 flights
- Mondays74% on time · p90 60 min · 314 flights
- Thursdays74% on time · p90 60 min · 310 flights
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