Airport · BTM · Butte, Montana
Butte, MT
Butte, MT posts top-5% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 8,024 flights (2020–2025); its biggest delay driver is carrier.
Data updated 2026-06-13
- 91%
- On-time
- Top 2%
- on-time, US airports
- 102 min
- Delay when late
- 0.52%
- Cancelled
Key Performance Metrics
Total Flights
8,024
Best Month
Nov 98.2%
Worst Month
Jan 94.8%
Delayed
719
Cancelled
42
BTM on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Where BTM sits among all 382 tracked airports
BTM's 91% on-time rate falls in the 90-95% band, the 12-airport band it shares.
National on-time-rate distribution
- 60-65% 1
1 airport between 60% and 65% on-time
1 airports
- 65-70% 4
4 airports between 65% and 70% on-time
4 airports
- 70-75% 9
9 airports between 70% and 75% on-time
9 airports
- 75-80% 48
48 airports between 75% and 80% on-time
48 airports
- 80-85%
192 airports between 80% and 85% on-time
192 airports
- 85-90%
116 airports between 85% and 90% on-time
116 airports
- 90-95% 12
12 airports between 90% and 95% on-time
12 airports
What this shows BTM is marked in the 90-95% band.
Delay Cause Breakdown
Top delay cause: Carrier. Total delay minutes: 35,622.
BTM - seasonal on-time pattern
Best: November (98.2%) · worst: January (94.8%)
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: November (98.2% on-time). Most delays: January (94.8% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| December | 115 | 12 | 1 | 95.9% |
| November | 112 | 8 | 0 | 98.2% |
| October | 116 | 7 | 0 | 97.8% |
| September | 112 | 8 | 0 | 97.6% |
| August | 110 | 8 | 0 | 97.4% |
| July | 114 | 12 | 0 | 95.9% |
| June | 105 | 13 | 0 | 95.2% |
| May | 109 | 8 | 3 | 98% |
| April | 109 | 8 | 1 | 96.9% |
| March | 114 | 10 | 1 | 95.8% |
| February | 106 | 12 | 1 | 95% |
| January | 115 | 14 | 1 | 94.8% |
Year-Over-Year Performance
Annual flight volume and on-time trends at BTM.
BTM - on-time rate by year
2020–2025, year-over-year trend.
| Year | Flights | Delayed | Cancelled | On-Time % |
|---|---|---|---|---|
| 2025 | 1,417 | 69 | 5 | 95.1% |
| 2024 | 1,380 | 40 | 0 | 97.1% |
| 2023 | 1,348 | 26 | 8 | 98.1% |
| 2022 | 1,221 | 56 | 8 | 95.4% |
| 2021 | 1,380 | 50 | 3 | 96.4% |
| 2020 | 1,278 | 35 | 18 | 97.3% |
Cancellation & Diversion Analysis
Flight disruption statistics for Butte, MT.
Cancellation Rate
0.52%
42 of 8,024 flights
Diversion Rate
0.04%
3 of 8,024 flights
Delay Rate
9.0%
719 of 8,024 flights
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Dec 2025 | 120 | 7 | 7 | 0 | 0 |
| Nov 2025 | 118 | 0 | 1 | 1 | 0 |
| Oct 2025 | 124 | 2 | 7 | 0 | 0 |
| Sep 2025 | 120 | 4 | 6 | 0 | 0 |
| Aug 2025 | 124 | 9 | 15 | 0 | 0 |
| Jul 2025 | 124 | 5 | 10 | 0 | 0 |
| Jun 2025 | 120 | 9 | 17 | 0 | 1 |
| May 2025 | 122 | 5 | 15 | 0 | 0 |
| Apr 2025 | 112 | 7 | 10 | 1 | 1 |
| Mar 2025 | 114 | 6 | 7 | 0 | 0 |
| Feb 2025 | 104 | 8 | 13 | 2 | 0 |
| Jan 2025 | 115 | 7 | 10 | 1 | 0 |
| Dec 2024 | 116 | 4 | 6 | 0 | 0 |
| Nov 2024 | 112 | 1 | 9 | 0 | 0 |
| Oct 2024 | 114 | 0 | 1 | 0 | 0 |
| Sep 2024 | 116 | 2 | 7 | 0 | 0 |
| Aug 2024 | 124 | 1 | 4 | 0 | 0 |
| Jul 2024 | 124 | 6 | 8 | 0 | 0 |
| Jun 2024 | 112 | 10 | 11 | 0 | 0 |
| May 2024 | 116 | 2 | 4 | 0 | 0 |
| Apr 2024 | 110 | 3 | 4 | 0 | 0 |
| Mar 2024 | 116 | 5 | 4 | 0 | 0 |
| Feb 2024 | 108 | 1 | 3 | 0 | 0 |
| Jan 2024 | 112 | 5 | 8 | 0 | 0 |
Top Routes from BTM
Busiest routes to and from Butte, MT.
| Route | Flights | On-Time | Distance |
|---|---|---|---|
| BTM (Butte) → SLC (Salt Lake City) | 3,311 | 91.9% | 358 mi |
| SLC (Salt Lake City) → BTM (Butte) | 3,310 | 91.2% | 358 mi |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Butte, MT's 91%.
Other Airports in Montana
Compare performance with other Montana airports.
Bozeman, MT
Bozeman · 117,386 flights
Missoula, MT
Missoula · 52,758 flights
Billings, MT
Billings · 51,010 flights
Kalispell, MT
Kalispell · 50,123 flights
Great Falls, MT
Great Falls · 29,395 flights
Helena, MT
Helena · 17,569 flights
West Yellowstone, MT
West Yellowstone · 3,872 flights
Keep exploring
More flight data around Butte, MT.
Montana flight data
Statewide on-time and delay aggregates, plus every reporting airport in Montana.
View MT data →Airport rankings
See where BTM sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put BTM head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About BTM
Butte, MT in Butte, Montana handled 8,024 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 91% on-time departure rate. Of those flights, 719 experienced delays, 42 were cancelled, and 3 were diverted. The cancellation rate works out to 0.52%, the diversion rate to 0.04%, and the average delay when departures run late is 102.0 minutes. These figures are the baseline for comparing BTM against other airports in the same state and nationally.
Breaking down what drives delays at BTM, Carrier leads the pack. Carrier accounts for 65.1% of total delay minutes, followed by Weather at 25.2% and NAS (National Aviation System) at 5.0%. Weather contributes 25.2% of delay minutes at this airport, while security holds the smallest share at 0.3%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, November runs the cleanest at BTM with a 98.2% on-time rate, while January is the roughest at 94.8% - a 3-point swing between best and worst month. Volume peaks in October, when average flights hit 116. The busiest route connecting BTM is to SLC (Salt Lake City), with 3,311 flights at a 91.9% on-time rate. Combine these numbers - 91% on-time, 102.0-minute average delay, 0.52% cancellation rate, and you have a concrete picture of departure reliability at Butte, MT.
Frequently Asked Questions
What is the on-time performance rate at Butte, MT (BTM)? ▼
What is the most common cause of delays at BTM? ▼
What is the average delay time at BTM? ▼
What is the best month to fly from BTM? ▼
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How many routes operate from BTM? ▼
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Flight Guides
Data-driven guides to help you understand airport and flight performance.
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Read our methodology - how this data is sourced, computed, and verified.
Using BTM's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- Check the busiest route from BTM before you book a connection. See top routes
- Travel in November rather than January if your dates are flexible. Seasonal patterns
- Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.