| Republic to Oerlinghausen | 4,707.02 mi (7,575.22 km) |
| Republic to Oestrich-Winkel | 4,756.69 mi (7,655.15 km) |
| Republic to Offenburg | 4,812.38 mi (7,744.77 km) |
| Republic to Oftersheim | 4,802.44 mi (7,728.79 km) |
| Republic to Ohrdruf | 4,824.77 mi (7,764.72 km) |
| Republic to Ohringen | 4,843.24 mi (7,794.44 km) |
| Republic to Olbernhau | 4,923.86 mi (7,924.18 km) |
| Republic to Olching | 4,950.73 mi (7,967.42 km) |
| Republic to Oldenburg | 4,647.25 mi (7,479.03 km) |
| Republic to Oldenburg in Holstein | 4,695.57 mi (7,556.79 km) |
| Republic to Olfen | 4,670.10 mi (7,515.80 km) |
| Republic to Olpe | 4,712.40 mi (7,583.88 km) |
| Republic to Olsberg | 4,723.58 mi (7,601.87 km) |
| Republic to Oranienburg | 4,835.77 mi (7,782.43 km) |
| Republic to Ortenberg | 4,782.16 mi (7,696.14 km) |
