| Middle Valley to Oerlinghausen | 4,502.62 mi (7,246.27 km) |
| Middle Valley to Oestrich-Winkel | 4,536.66 mi (7,301.05 km) |
| Middle Valley to Offenburg | 4,581.58 mi (7,373.33 km) |
| Middle Valley to Oftersheim | 4,579.57 mi (7,370.10 km) |
| Middle Valley to Ohrdruf | 4,617.66 mi (7,431.41 km) |
| Middle Valley to Ohringen | 4,621.62 mi (7,437.78 km) |
| Middle Valley to Olbernhau | 4,722.72 mi (7,600.48 km) |
| Middle Valley to Olching | 4,727.36 mi (7,607.95 km) |
| Middle Valley to Oldenburg | 4,450.28 mi (7,162.03 km) |
| Middle Valley to Oldenburg in Holstein | 4,513.56 mi (7,263.87 km) |
| Middle Valley to Olfen | 4,460.73 mi (7,178.84 km) |
| Middle Valley to Olpe | 4,499.13 mi (7,240.64 km) |
| Middle Valley to Olsberg | 4,514.32 mi (7,265.09 km) |
| Middle Valley to Oranienburg | 4,648.76 mi (7,481.46 km) |
| Middle Valley to Ortenberg | 4,567.35 mi (7,350.44 km) |
