| Ramnicu Valcea to Oerlinghausen | 858.19 mi (1,381.12 km) |
| Ramnicu Valcea to Oestrich-Winkel | 832.91 mi (1,340.44 km) |
| Ramnicu Valcea to Offenburg | 810.00 mi (1,303.56 km) |
| Ramnicu Valcea to Oftersheim | 795.36 mi (1,280.02 km) |
| Ramnicu Valcea to Ohrdruf | 743.06 mi (1,195.84 km) |
| Ramnicu Valcea to Ohringen | 752.46 mi (1,210.97 km) |
| Ramnicu Valcea to Olbernhau | 638.79 mi (1,028.04 km) |
| Ramnicu Valcea to Olching | 654.25 mi (1,052.91 km) |
| Ramnicu Valcea to Oldenburg | 914.41 mi (1,471.60 km) |
| Ramnicu Valcea to Oldenburg in Holstein | 873.01 mi (1,404.98 km) |
| Ramnicu Valcea to Olfen | 900.17 mi (1,448.69 km) |
| Ramnicu Valcea to Olpe | 863.54 mi (1,389.73 km) |
| Ramnicu Valcea to Olsberg | 846.67 mi (1,362.59 km) |
| Ramnicu Valcea to Oranienburg | 729.84 mi (1,174.57 km) |
| Ramnicu Valcea to Ortenberg | 797.04 mi (1,282.71 km) |
