| Portage to Indianapolis (Indiana) | 169.89 mi (273.41 km) |
| Portage to Indianola (Iowa) | 414.76 mi (667.50 km) |
| Portage to Indio (California) | 1,757.40 mi (2,828.26 km) |
| Portage to Inglewood (California) | 1,857.11 mi (2,988.72 km) |
| Portage to Inkster (Michigan) | 116.58 mi (187.61 km) |
| Portage to Inver Grove Heights (Minnesota) | 415.66 mi (668.94 km) |
| Portage to Inwood (New York) | 622.61 mi (1,002.00 km) |
| Portage to Iona (Florida) | 1,102.97 mi (1,775.06 km) |
| Portage to Ionia (Michigan) | 59.82 mi (96.27 km) |
| Portage to Iowa City (Iowa) | 307.57 mi (494.98 km) |
| Portage to Irmo (South Carolina) | 608.13 mi (978.69 km) |
| Portage to Irondale (Alabama) | 600.90 mi (967.06 km) |
| Portage to Ironton (Ohio) | 296.15 mi (476.60 km) |
| Portage to Irvine (California) | 1,837.17 mi (2,956.64 km) |
| Portage to Irving (Texas) | 895.84 mi (1,441.72 km) |
