Route · SLC → HLN · 2020–2025 BTS data
Salt Lake City to Helena
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to HLN (Salt Lake City to Helena) ranks #2699 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 94.2%
- On-time
- +15.2 pts
- vs US avg
- 84 min
- Delay when late
- 4,470
- Flights
- #2699 of 4927
- Corpus placement
Cancelled
0.3%
Best Month
Dec 2025 100%
Worst Month
Jan 2024 82%
Distance
402 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 59 | 0 | 0 | 0 | OO |
| Nov 2025 | 59 | 2 | 2 | 0 | OO |
| Oct 2025 | 62 | 3 | 0 | 0 | OO |
| Sep 2025 | 60 | 1 | 0 | 0 | OO |
| Aug 2025 | 62 | 1 | 0 | 0 | OO |
| Jul 2025 | 62 | 2 | 0 | 0 | OO |
| Jun 2025 | 60 | 1 | 0 | 0 | OO |
| May 2025 | 62 | 3 | 0 | 0 | OO |
| Apr 2025 | 60 | 0 | 0 | 0 | OO |
| Mar 2025 | 62 | 1 | 0 | 0 | OO |
| Feb 2025 | 56 | 1 | 0 | 0 | OO |
| Jan 2025 | 61 | 5 | 1 | 2 | OO |
| Dec 2024 | 59 | 4 | 0 | 1 | OO |
| Nov 2024 | 59 | 3 | 0 | 0 | OO |
| Oct 2024 | 62 | 1 | 0 | 0 | OO |
| Sep 2024 | 60 | 1 | 0 | 0 | OO |
| Aug 2024 | 62 | 0 | 0 | 0 | OO |
| Jul 2024 | 62 | 4 | 0 | 0 | OO |
| Jun 2024 | 60 | 4 | 0 | 0 | OO |
| May 2024 | 62 | 4 | 0 | 0 | OO |
| Apr 2024 | 60 | 2 | 0 | 0 | OO |
| Mar 2024 | 62 | 6 | 0 | 0 | OO |
| Feb 2024 | 58 | 3 | 0 | 0 | OO |
| Jan 2024 | 68 | 12 | 2 | 0 | OO |
SLC–HLN seasonal on-time pattern
Best: August (96.5%) · weakest: January (89.0%)
Strongest calendar month
August
96.5% on-time · ~67 flights/mo
Busiest calendar month
January
~67 flights/mo avg
Weakest calendar month
January
89.0% on-time · ~67 flights/mo
Cancellation Rate
0.3%
5 of 1,459 flights
Diversion Rate
0.2%
3 of 1,459 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SLC - Salt Lake City
Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.
SLC on-time profileHLN - Helena
Full on-time, delay-cause, and seasonal performance for Helena, MT.
HLN on-time profileCompare the two airports
See SLC and HLN side by side on delays, cancellations, and reliability.
Compare SLC vs HLNOrigin-hub reliability standing
Among SLC's stronger departures
SLC → HLN posts a 94.2% on-time rate, landing in the ≥85% band with 54 of 85 BTS-tracked routes leaving Salt Lake City. The same hub also shows 31 mid-band and 0 challenged departures · fleet-wide on-time rank #5 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SLC–HLN.
Routes with a similar on-time rate
What the Data Says About SLC to HLN
Salt Lake City to Helena (SLC to HLN) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 94.2% on-time rate across 4,470 flights, with delays that do happen averaging 84.2 minutes. The corridor runs roughly 402 miles and is served by 1 carrier. Over the most recent 24 months, 5 of 1,459 flights were cancelled (0.3%) and 3 diverted (0.2%).
The monthly split is wide on this route: Dec 2025 posted the strongest performance at 100% on-time, while Jan 2024 came in at just 82% - a 18-point swing worth factoring into travel timing.
On the multi-year calendar, SLC–HLN peaks in August at 96.5% on-time while January carries the heaviest traffic (~67 flights per month) ; the softest month is January at 89.0%, a 7.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SLC to HLN rank among US routes by traffic? ▼
How often are flights delayed from SLC to HLN? ▼
What is the cancellation rate for SLC to HLN? ▼
How far is the flight from SLC to HLN? ▼
When is the best time to fly from SLC to HLN? ▼
Airports on this route
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.
Using SLC–HLN data
SLC–HLN runs 15.2 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare SLC and HLN airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
- If your dates flex, August (96.5% on-time) beats January (89.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 94.2% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.