DEN to GTF flight delays
Denver, CO (DEN) Great Falls, MT (GTF) · 623 miles
729 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
77.66%
Arrived on time
Within 15 minutes of schedule
0.55%
Cancelled
Share of scheduled flights
66 min
When late, late by
Average across delayed arrivals
16 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. SkyWest Airlines arrived on time 11.4 points more often than United Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In November it ran 41.6 points more punctual than in June — 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 two directions do not behave alike. GTF to DEN arrives on time 7.9 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
The Denver to Great Falls route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, SkyWest Airlines arrived on time most often on DEN to GTF. United Airlines was late most often. Flights ran closest to schedule in November and worst in June.
Every airline on DEN to GTF
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 |
|---|---|---|---|---|---|
| United Airlines | 528 | 74.52% | 0.38% | 65 min | C |
| SkyWest Airlines | 201 | 85.93% | 1% | 66 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
GTF to DEN Great Falls back to Denver 85.56% on time BOther routes from Denver
Common questions
Are flights from Denver to Great Falls usually delayed?
77.66% of flights on the DEN to GTF 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 airline is most on time from Denver to Great Falls?
SkyWest Airlines, at 85.93% on time across 201 flights. The least punctual on the route was United Airlines at 74.52%.
How often are DEN to GTF flights cancelled?
0.55% of scheduled flights did not operate — about 6 in every thousand. That is in the normal range.
What is the best month to fly Denver to Great Falls?
November, when 94.9% of flights arrived on time. The worst was June at 53.3%.
When DEN to GTF flights are late, how late are they?
About 66 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 DEN to GTF 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 →