| South River to Oskaloosa (Iowa) | 954.20 mi (1,535.64 km) |
| South River to Oswego (Illinois) | 731.37 mi (1,177.03 km) |
| South River to Oswego (New York) | 234.57 mi (377.50 km) |
| South River to Otsego (Minnesota) | 1,026.95 mi (1,652.71 km) |
| South River to Ottawa (Illinois) | 756.25 mi (1,217.07 km) |
| South River to Ottawa (Kansas) | 1,117.76 mi (1,798.86 km) |
| South River to Ottumwa (Iowa) | 943.68 mi (1,518.70 km) |
| South River to Overland (Missouri) | 858.97 mi (1,382.37 km) |
| South River to Overland Park (Kansas) | 1,083.09 mi (1,743.06 km) |
| South River to Overlea (Maryland) | 135.78 mi (218.51 km) |
| South River to Oviedo (Florida) | 901.16 mi (1,450.28 km) |
| South River to Owasso (Oklahoma) | 1,193.86 mi (1,921.34 km) |
| South River to Owatonna (Minnesota) | 993.84 mi (1,599.43 km) |
| South River to Owensboro (Kentucky) | 707.12 mi (1,138.00 km) |
| South River to Owings Mills (Maryland) | 146.45 mi (235.69 km) |
