| Portage to Orangeburg (South Carolina) | 654.20 mi (1,052.83 km) |
| Portage to Orangevale (California) | 1,875.40 mi (3,018.16 km) |
| Portage to Orchards (Washington) | 1,836.88 mi (2,956.16 km) |
| Portage to Orcutt (California) | 1,934.77 mi (3,113.71 km) |
| Portage to Oregon (Ohio) | 117.23 mi (188.66 km) |
| Portage to Oregon (Wisconsin) | 199.68 mi (321.35 km) |
| Portage to Oregon City (Oregon) | 1,842.44 mi (2,965.12 km) |
| Portage to Orem (Utah) | 1,357.31 mi (2,184.38 km) |
| Portage to Orinda (California) | 1,943.13 mi (3,127.16 km) |
| Portage to Orland Park (Illinois) | 123.76 mi (199.17 km) |
| Portage to Orlando (Florida) | 977.63 mi (1,573.34 km) |
| Portage to Ormond Beach (Florida) | 925.89 mi (1,490.08 km) |
| Portage to Oro Valley (Arizona) | 1,542.06 mi (2,481.71 km) |
| Portage to Oroville (California) | 1,875.33 mi (3,018.05 km) |
| Portage to Oshkosh (Wisconsin) | 195.74 mi (315.01 km) |
