| Sofia to Obernburg am Main | 835.96 mi (1,345.35 km) |
| Sofia to Obernkirchen | 933.47 mi (1,502.28 km) |
| Sofia to Oberschleissheim | 685.74 mi (1,103.60 km) |
| Sofia to Oberstdorf | 714.05 mi (1,149.15 km) |
| Sofia to Obertraubling | 688.88 mi (1,108.64 km) |
| Sofia to Obertshausen | 855.75 mi (1,377.20 km) |
| Sofia to Oberursel | 870.34 mi (1,400.68 km) |
| Sofia to Ochsenfurt | 793.87 mi (1,277.61 km) |
| Sofia to Ochsenhausen | 746.47 mi (1,201.33 km) |
| Sofia to Ochtrup | 995.97 mi (1,602.86 km) |
| Sofia to Odenthal | 954.70 mi (1,536.45 km) |
| Sofia to Oelde | 947.80 mi (1,525.34 km) |
| Sofia to Oelsnitz | 750.49 mi (1,207.80 km) |
| Sofia to Oer-Erkenschwick | 972.06 mi (1,564.39 km) |
| Sofia to Oerlinghausen | 935.60 mi (1,505.71 km) |
