| Box Elder to Oerlinghausen | 4,656.67 mi (7,494.19 km) |
| Box Elder to Oestrich-Winkel | 4,729.87 mi (7,612.00 km) |
| Box Elder to Offenburg | 4,801.46 mi (7,727.21 km) |
| Box Elder to Oftersheim | 4,778.93 mi (7,690.94 km) |
| Box Elder to Ohrdruf | 4,775.32 mi (7,685.14 km) |
| Box Elder to Ohringen | 4,816.53 mi (7,751.45 km) |
| Box Elder to Olbernhau | 4,862.14 mi (7,824.86 km) |
| Box Elder to Olching | 4,923.83 mi (7,924.14 km) |
| Box Elder to Oldenburg | 4,586.94 mi (7,381.97 km) |
| Box Elder to Oldenburg in Holstein | 4,610.51 mi (7,419.90 km) |
| Box Elder to Olfen | 4,628.73 mi (7,449.22 km) |
| Box Elder to Olpe | 4,676.02 mi (7,525.33 km) |
| Box Elder to Olsberg | 4,680.48 mi (7,532.50 km) |
| Box Elder to Oranienburg | 4,754.41 mi (7,651.48 km) |
| Box Elder to Ortenberg | 4,746.22 mi (7,638.31 km) |
