Denver (DEN) to Great Falls (GTF): On-Time Performance
Data through July 2026
The calendar drives reliability on DEN–GTF. December 2024 flights landed on schedule 98% of the time, but June 2026 dropped to 53% — a gap of 45 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 72%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 2.0
- last 12 months
- Duration
- 2h 3m
- scheduled
- Distance
- 623 mi
Best airline from DEN to GTF
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 84% | 12 min | 0.9% | 656 |
| United Airlines | 73% | 21 min | 0.5% | 863 |
Monthly on-time trend
Best time to fly from DEN to GTF
Aim for departures around 8 p.m. (95% on-time); avoid 7 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 13 min |
| Tuesday | 77% | 19 min |
| Wednesday | 75% | 19 min |
| Thursday | 80% | 19 min |
| Friday | 75% | 18 min |
| Saturday | 79% | 14 min |
| Sundaybest | 81% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft59%
- Airline operations24%
- National airspace system13%
- Weather4%
Frequently asked questions
- How often are flights from DEN to GTF delayed?
- 22% of DEN–GTF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from DEN to GTF?
- SkyWest Airlines has the best on-time record on this route at 84%, based on 656 flights. 2 airlines flew DEN–GTF frequently enough to compare in this period.
- What is the best time of day to fly from DEN to GTF?
- Departures around 8 p.m. have the best record (95% on-time), while departures around 7 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DEN to GTF?
- The scheduled DEN–GTF flight time averages 2h 3m over 623 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are DEN to GTF flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to GTF?
- June 2026 was the roughest month in this dataset, with only 53% of arrivals on time. The best was December 2024 at 98%. If your dates are flexible, that 45-point gap is worth planning around.
Explore related pages
More routes from DEN
Other ways to fly to Great Falls (GTF)
Related guides
Based on 1,519 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.