| | Portsmouth, NH | Billings, MT | United States |
| Commute Time | 22 | 17 | 27 |
| space | | | |
| Commute Mode | | | |
| | Portsmouth, NH | Billings, MT | United States |
| Auto (alone) | 71.8% | 81.5% | 73.2% |
| Carpool | 6.2% | 8.1% | 8.6% |
| Mass Transit | 1.2% | 1.1% | 4.2% |
| Bicycle | 0.6% | 0.5% | 0.5% |
| Walk | 4.2% | 2.4% | 2.5% |
| Work at Home | 14.6% | 5.8% | 9.7% |
| space1 | | | |
| Commute Time To Work | | | |
| | Portsmouth, NH | Billings, MT | United States |
| Commute Less Than 5 min. | 3.9% | 3.4% | 2.9% |
| Commute 6 to 9 min. | 21.0% | 15.0% | 9.5% |
| Commute 10 to 14 min. | 19.7% | 23.8% | 13.2% |
| Commute 15 to 19 min. | 13.2% | 27.1% | 15.2% |
| Commute 20 to 24 min. | 13.7% | 15.5% | 14.3% |
| Commute 25 to 29 min. | 6.3% | 4.3% | 6.7% |
| Commute 30 to 34 min. | 5.6% | 5.9% | 13.7% |
| Commute 35 to 39 min. | 1.6% | 0.4% | 3.1% |
| Commute 40 to 44 min. | 2.1% | 0.4% | 4.0% |
| Commute 45 to 59 min. | 4.6% | 1.3% | 8.2% |
| Commute 60 to 89 min. | 4.2% | 1.4% | 6.2% |
| Commute greater than 90 min. | 4.0% | 1.5% | 2.9% |