| South River to Odenton (Maryland) | 155.59 mi (250.40 km) |
| South River to Odessa (Texas) | 1,659.84 mi (2,671.25 km) |
| South River to Ogden (Utah) | 1,950.28 mi (3,138.67 km) |
| South River to Oildale (California) | 2,431.72 mi (3,913.47 km) |
| South River to Ojus (Florida) | 1,054.79 mi (1,697.52 km) |
| South River to Okemos (Michigan) | 541.30 mi (871.14 km) |
| South River to Oklahoma City (Oklahoma) | 1,302.22 mi (2,095.73 km) |
| South River to Okmulgee (Oklahoma) | 1,220.02 mi (1,963.44 km) |
| South River to Olathe (Kansas) | 1,090.14 mi (1,754.40 km) |
| South River to Old Jamestown (Missouri) | 852.35 mi (1,371.73 km) |
| South River to Oldsmar (Florida) | 977.48 mi (1,573.10 km) |
| South River to Olean (New York) | 238.94 mi (384.54 km) |
| South River to Olive Branch (Mississippi) | 924.93 mi (1,488.52 km) |
| South River to Olivehurst (California) | 2,477.31 mi (3,986.85 km) |
| South River to Olney (Maryland) | 168.80 mi (271.65 km) |
