Best Time to Fly MSO to DEN: On-Time Stats by Hour & Airline
Missoula Montana → Denver International
Data through July 2026 · Last updated October 18, 2026
1,204 flights were scheduled from Missoula (MSO) to Denver (DEN) in the last 12 months, and 81.1% of those that flew arrived on time, 3.4 points above the US average of 77.6%.
Among 2 airlines, United Airlines led with 84.0% on time and SkyWest Airlines was last with 76.5%.
Over 24 months, Tuesday was the most reliable day (81% on time) and June the worst month (74%).
The cancellation rate was 0.5% (US average 1.8%).
MSO to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 84.0% | 86 min | 0.3% | 717 |
| SkyWest Airlines | 76.5% | 92 min | 0.8% | 473 |
| Frontier Airlines | Limited data | 14 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MSO to DEN
On-time arrival % by scheduled departure hour (local time), 2,400 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 88.5% | 0.3% | 723 |
| 10am–11am | 88.5% | 1.6% | 186 |
| 12pm–1pm | Limited data | 28 | |
| 1pm–2pm | Limited data | 2 | |
| 2pm–3pm | 74.1% | 0.4% | 724 |
| 3pm–4pm | Limited data | 10 | |
| 4pm–5pm | 80.8% | 0.0% | 47 |
| 5pm–6pm | 70.6% | 1.2% | 672 |
| 6pm–7pm | Limited data | 5 | |
| 7pm–8pm | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MSO to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 65.0% | -14.8 pts | 0.0% | 40 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.0% | +3.2 pts | 2.2% | 90 |
| Summer peak (Jun 15 - Aug 15) | 76.0% | -3.8 pts | 1.4% | 499 |
| All other days | 79.8% | — | 0.4% | 1,771 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).