Best Time to Fly DEN to GTF: On-Time Stats by Hour & Airline
Denver International → Great Falls International
Data through July 2026 · Last updated October 18, 2026
728 flights were scheduled from Denver (DEN) to Great Falls (GTF) in the last 12 months, and 77.8% of those that flew arrived on time, in line with the US average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 85.9%, while United Airlines trailed at 74.7%.
December has been the best month (92% on time) and Wednesday the weakest day of the week (74%).
0.6% of flights were cancelled, versus 1.8% nationally.
DEN to GTF 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 |
|---|---|---|---|---|
| SkyWest Airlines | 85.9% | 66 min | 1.0% | 201 |
| United Airlines | 74.7% | 67 min | 0.4% | 527 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to GTF
On-time arrival % by scheduled departure hour (local time), 1,457 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 11am–12pm | 84.5% | 0.3% | 730 |
| 7pm–8pm | 69.9% | 0.9% | 671 |
| 8pm–9pm | 94.6% | 0.0% | 56 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to GTF
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) | Limited data | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 98.3% | +17.6 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 60.2% | -20.6 pts | 0.4% | 247 |
| All other days | 80.7% | — | 0.6% | 1,124 |
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).