Helena (HLN) to Salt Lake City (SLC): On-Time Performance
Data through May 2026
SkyWest Airlines effectively owns the HLN–SLC corridor, operating 100% of its flights and landing on time 96% of the time. That concentration hasn't hurt reliability: the route beats the national on-time average by 18 points (96% vs 78%).
- On-time
- 96%
- arrived <15 min late
- Avg delay
- 4 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 33m
- scheduled
- Distance
- 402 mi
Monthly on-time trend
Best time to fly from HLN to SLC
Departure time makes little difference on this route — on-time rates stay within a few points across the day.
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 96% | 4 min |
| Tuesdaybest | 98% | 5 min |
| Wednesday | 96% | 4 min |
| Thursday | 97% | 2 min |
| Friday | 95% | 4 min |
| Saturday | 97% | 2 min |
| Sunday | 97% | 5 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Airline operations68%
- National airspace system4%
- Weather27%
Frequently asked questions
- How often are flights from HLN to SLC delayed?
- 4% of HLN–SLC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 4 minutes.
- What is the best time of day to fly from HLN to SLC?
- Departures around 6 a.m. have the best record (99% on-time), while departures around 1 p.m. have the worst (95%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from HLN to SLC?
- The scheduled HLN–SLC flight time averages 1h 33m over 402 miles. Actual arrival times vary — flights on this route land 15+ minutes late 4% of the time.
- How often are HLN to SLC flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for HLN to SLC?
- Tuesday flights have the best record at 98% on-time. Day-of-week differences on this route are modest.
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Based on 1,450 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.