Route
DEN → HLN
Denver International Airport Helena Regional Airport
594 miles
Return route HLN → DEN →
How punctual is this route?
- On-time arrivals
- 80.9%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 77 min
- Flights arriving 15+ minutes late
- Flights tracked
- 783
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 27%
- Late-arriving aircraft 24%
- Extreme weather 12%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 82.2% | 90 |
| October 2025 | 89.7% | 87 |
| November 2025 | 87.9% | 59 |
| December 2025 | 78.7% | 62 |
| January 2026 | 83.9% | 62 |
| February 2026 | 87.3% | 56 |
| March 2026 | 73.8% | 62 |
| April 2026 | 95.0% | 60 |
| May 2026 | 88.7% | 62 |
| June 2026 | 63.3% | 60 |
| July 2026 | 69.5% | 61 |
| August 2026 | 67.2% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| SkyWest Airlines | 783 | 80.9% | 0.5% | 77 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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