HLN to DEN flight delays
Helena, MT (HLN) Denver, CO (DEN) · 594 miles
844 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
78.92%
Arrived on time
Within 15 minutes of schedule
0.71%
Cancelled
Share of scheduled flights
105 min
When late, late by
Average across delayed arrivals
23 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In May it ran 42.3 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 105 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
The route has been getting better. The later months in the record run 16.8 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
This route does worse than its own airport. HLN as a whole runs 9.9 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Which airline should you fly on this route?
Over January 2025 – August 2026, SkyWest Airlines arrived on time most often on HLN to DEN. Flights ran closest to schedule in May and worst in July.
Every airline on HLN to DEN
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 844 | 78.92% | 0.71% | 105 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
DEN to HLN Denver back to Helena 78.92% on time COther routes from Helena
Common questions
Are flights from Helena to Denver usually delayed?
78.92% of flights on the HLN to DEN route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from Helena to Denver?
Only SkyWest Airlines appears in the published record on this route, with 844 flights and 78.92% arriving on time.
How often are HLN to DEN flights cancelled?
0.71% of scheduled flights did not operate — about 7 in every thousand. That is in the normal range.
What is the best month to fly Helena to Denver?
May, when 93.5% of flights arrived on time. The worst was July at 51.2%.
When HLN to DEN flights are late, how late are they?
About 105 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on HLN to DEN during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →