Butte (BTM) to Denver (DEN): On-Time Performance
Data through May 2026
The calendar drives reliability on BTM–DEN. November 2025 flights landed on schedule 97% of the time, but February 2025 dropped to 63% — a gap of 34 points. Across the full period the route averages 79% on-time against a national 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 4m
- scheduled
- Distance
- 578 mi
Monthly on-time trend
Best time to fly from BTM to DEN
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 20 min |
| Tuesday | 77% | 18 min |
| Wednesday | 81% | 11 min |
| Thursday | 80% | 18 min |
| Friday | 74% | 22 min |
| Saturday | 81% | 25 min |
| Sundaybest | 89% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft2%
- Airline operations73%
- National airspace system19%
- Weather5%
Frequently asked questions
- How often are flights from BTM to DEN delayed?
- 21% of BTM–DEN flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 17 minutes.
- How long is the flight from BTM to DEN?
- The scheduled BTM–DEN flight time averages 2h 4m over 578 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are BTM to DEN flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from BTM to DEN?
- February 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was November 2025 at 97%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 513 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.