| South River to Oerlinghausen | 3,828.24 mi (6,160.95 km) |
| South River to Oestrich-Winkel | 3,856.61 mi (6,206.61 km) |
| South River to Offenburg | 3,898.13 mi (6,273.44 km) |
| South River to Oftersheim | 3,898.48 mi (6,274.00 km) |
| South River to Ohrdruf | 3,941.84 mi (6,343.77 km) |
| South River to Ohringen | 3,940.81 mi (6,342.13 km) |
| South River to Olbernhau | 4,048.77 mi (6,515.87 km) |
| South River to Olching | 4,045.73 mi (6,510.98 km) |
| South River to Oldenburg | 3,779.07 mi (6,081.83 km) |
| South River to Oldenburg in Holstein | 3,848.61 mi (6,193.74 km) |
| South River to Olfen | 3,784.62 mi (6,090.76 km) |
| South River to Olpe | 3,821.48 mi (6,150.07 km) |
| South River to Olsberg | 3,838.06 mi (6,176.76 km) |
| South River to Oranienburg | 3,980.92 mi (6,406.68 km) |
| South River to Ortenberg | 3,888.95 mi (6,258.65 km) |
