Historical on-time performance
Denver to Helena
594 miData through May 2026Source: US DOT · BTS
Flights on DEN–HLN arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 874 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time77%Medianon timep9055 minCancel1.3%Flights874
Why flights run late
Delay causes
- Airline30%
- Weather10%
- Air traffic (NAS)26%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather73%
- Air traffic (NAS)27%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 11 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 DEN → HLN
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 82% on time.
- Middays82% on time · p90 35 min · 1,092 flights
- Afternoons75% on time · p90 45 min · 155 flights · limited
- Evenings73% on time · p90 75 min · 1,084 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Wednesdays83% on time · p90 45 min · 334 flights
- Tuesdays79% on time · p90 45 min · 334 flights
- Saturdays78% on time · p90 55 min · 333 flights
- Sundays76% on time · p90 55 min · 336 flights
- Mondays76% on time · p90 55 min · 334 flights
- Thursdays75% on time · p90 60 min · 333 flights
- Fridays75% on time · p90 45 min · 336 flights
Keep exploring