DEN to MSO flight delays
Denver, CO (DEN) Missoula, MT (MSO) · 679 miles
1,214 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
80.48%
Arrived on time
Within 15 minutes of schedule
0.33%
Cancelled
Share of scheduled flights
62 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In November it ran 23.6 points more punctual than in December — 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 2 airlines here are separated by under 4 points — close enough to call a tie. Choose on price and departure time.
The Denver to Missoula 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 MSO. United Airlines was late most often. Flights ran closest to schedule in November and worst in December.
Every airline on DEN to MSO
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 | 718 | 78.99% | 0.14% | 56 min | C |
| SkyWest Airlines | 474 | 82.52% | 0.63% | 74 min | B |
| Frontier Airlines | 22 | 85.71% | 0% | 58 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MSO to DEN Missoula back to Denver 80.62% on time BOther routes from Denver
Common questions
Are flights from Denver to Missoula usually delayed?
80.48% of flights on the DEN to MSO route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Denver to Missoula?
SkyWest Airlines, at 82.52% on time across 474 flights. The least punctual on the route was United Airlines at 78.99%.
How often are DEN to MSO flights cancelled?
0.33% of scheduled flights did not operate — about 3 in every thousand. That is in the normal range.
What is the best month to fly Denver to Missoula?
November, when 89.9% of flights arrived on time. The worst was December at 66.3%.
When DEN to MSO flights are late, how late are they?
About 62 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 MSO 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 →