| | Napa, CA | Butte-Silver Bow, MT | United States |
| Commute Time | 24 | 15 | 27 |
| space | | | |
| Commute Mode | | | |
| | Napa, CA | Butte-Silver Bow, MT | United States |
| Auto (alone) | 76.1% | 76.5% | 73.2% |
| Carpool | 10.0% | 11.7% | 8.6% |
| Mass Transit | 0.8% | 1.0% | 4.2% |
| Bicycle | 1.0% | 0.1% | 0.5% |
| Walk | 2.0% | 3.1% | 2.5% |
| Work at Home | 8.5% | 5.3% | 9.7% |
| space1 | | | |
| Commute Time To Work | | | |
| | Napa, CA | Butte-Silver Bow, MT | United States |
| Commute Less Than 5 min. | 2.7% | 10.1% | 2.9% |
| Commute 6 to 9 min. | 14.6% | 21.4% | 9.5% |
| Commute 10 to 14 min. | 18.3% | 24.7% | 13.2% |
| Commute 15 to 19 min. | 16.9% | 19.2% | 15.2% |
| Commute 20 to 24 min. | 10.0% | 7.8% | 14.3% |
| Commute 25 to 29 min. | 5.6% | 3.4% | 6.7% |
| Commute 30 to 34 min. | 11.5% | 6.3% | 13.7% |
| Commute 35 to 39 min. | 2.7% | 0.9% | 3.1% |
| Commute 40 to 44 min. | 2.9% | 0.4% | 4.0% |
| Commute 45 to 59 min. | 5.5% | 3.5% | 8.2% |
| Commute 60 to 89 min. | 7.0% | 1.3% | 6.2% |
| Commute greater than 90 min. | 2.4% | 1.1% | 2.9% |