Bert Mooney (BTM) Delays and On-Time Departures
Butte, MT · ranked 9th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
89.2% of the 726 flights scheduled to depart Butte (BTM) in the last 12 months left on time, 11.8 points above the US average of 77.4%.
That ranks 9th of 333 US airports tracked on this site, with 0.4% of departures cancelled.
November has been the best month (99% on time) and Thursday the weakest day of the week (88%).
Best time of day to fly out of Butte (BTM)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 85.9% | 0.0% | 198 |
| 10am–11am | 81.0% | 0.8% | 376 |
| 11am–12pm | 96.6% | 0.0% | 149 |
| 1pm–2pm | Limited data | 1 | |
| 3pm–4pm | 91.2% | 0.0% | 34 |
| 5pm–6pm | 97.8% | 0.0% | 46 |
| 6pm–7pm | 95.9% | 0.7% | 618 |
Airlines at BTM ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 89.2% | 87.8% | 0.4% | 726 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of BTM
On-time departures by day, 24 months.
Best month to fly out of BTM
On-time departures by month, 24 months.
Holiday travel at Butte (BTM)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 83.0% | -8.6 pts | 0.0% | 53 |
| Summer peak (Jun 15 - Aug 15) | 86.7% | -5.0 pts | 0.0% | 248 |
| All other days | 91.6% | — | 0.6% | 1,095 |
Monthly on-time departure trend at BTM
On-time departure % each month, with the 12-month US average for reference.
Routes from Butte (BTM)
Every route from BTM with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| BTM → Denver (DEN) | 80.4% | 0.3% | 365 |
| BTM → Salt Lake City (SLC) | 95.2% | 0.6% | 361 |