Historical on-time performance
Helena to Salt Lake City
402 miData through May 2026Source: US DOT · BTS
Flights on HLN–SLC arrive on time 96% of the time over the last 12 months.
On-time rate96%arrived within 15 min
p90 delayon time1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 725 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time96%Medianon timep90on timeCancel0.3%Flights725
Why flights run late
Delay causes
- Airline82%
- Weather14%
- Air traffic (NAS)5%
- Late aircraft0%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather0%
- Air traffic (NAS)100%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 2 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 HLN → SLC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 96% on time.
- Mornings96% on time · p90 on time · 1,096 flights
- Middays93% on time · p90 5 min · 1,081 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 92% to 97% on time.
- Tuesdays97% on time · p90 on time · 312 flights
- Saturdays96% on time · p90 5 min · 317 flights
- Sundays95% on time · p90 5 min · 313 flights
- Mondays95% on time · p90 5 min · 311 flights
- Fridays94% on time · p90 5 min · 316 flights
- Thursdays94% on time · p90 5 min · 311 flights
- Wednesdays92% on time · p90 5 min · 310 flights
Keep exploring