Route · DEN → HLN · 2020–2025 BTS data
Denver to Helena
The DEN–HLN corridor (Denver, CO → Helena, MT) runs ahead of the national average, served by 1 carrier across roughly 594 miles.
Data updated 2026-06-13
- 81.5%
- On-time
- +2.5 pts
- vs US avg
- 87 min
- Delay when late
- 3,036
- Flights
Cancelled
1.4%
Best Month
Mar 2024 92%
Worst Month
Feb 2025 59%
Distance
594 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 62 | 13 | 0 | 1 | OO |
| Nov 2025 | 59 | 7 | 1 | 0 | OO |
| Oct 2025 | 87 | 9 | 0 | 0 | OO |
| Sep 2025 | 90 | 16 | 0 | 0 | OO |
| Aug 2025 | 93 | 33 | 2 | 3 | OO |
| Jul 2025 | 91 | 32 | 4 | 1 | OO |
| Jun 2025 | 90 | 35 | 2 | 0 | OO |
| May 2025 | 72 | 17 | 2 | 0 | OO |
| Apr 2025 | 60 | 15 | 1 | 0 | OO |
| Mar 2025 | 62 | 10 | 0 | 0 | OO |
| Feb 2025 | 56 | 23 | 0 | 0 | OO |
| Jan 2025 | 62 | 19 | 1 | 2 | OO |
| Dec 2024 | 62 | 10 | 0 | 0 | OO |
| Nov 2024 | 59 | 14 | 3 | 0 | OO |
| Oct 2024 | 62 | 6 | 0 | 0 | OO |
| Sep 2024 | 60 | 9 | 0 | 0 | OO |
| Aug 2024 | 62 | 19 | 0 | 0 | OO |
| Jul 2024 | 62 | 11 | 0 | 0 | OO |
| Jun 2024 | 60 | 15 | 0 | 1 | OO |
| May 2024 | 62 | 9 | 1 | 0 | OO |
| Apr 2024 | 60 | 10 | 0 | 0 | OO |
| Mar 2024 | 62 | 5 | 3 | 0 | OO |
| Feb 2024 | 58 | 11 | 1 | 1 | OO |
| Jan 2024 | 62 | 15 | 2 | 1 | OO |
Cancellation Rate
1.4%
23 of 1,615 flights
Diversion Rate
0.6%
10 of 1,615 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Origin airport →HLN - Helena
Full on-time, delay-cause, and seasonal performance for Helena, MT.
Destination airport →Compare the two airports
See DEN and HLN side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DEN–HLN.
Routes with a similar on-time rate
Routes of a similar trip length
What the Data Says About DEN to HLN
3,036 tracked flights put the DEN to HLN pairing (Denver to Helena) at a 81.5% on-time rate, squarely in line with the wider network. Delays that do occur run 87.4 minutes on average. Across the 594-mile route and its 1 carrier, the trailing 24 months show 1.4% cancelled and 0.6% diverted (1,615 flights sampled).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 92% on-time, while Feb 2025 came in at just 59% - a 33-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.