| Petrosani to Oberkirch | 750.94 mi (1,208.52 km) |
| Petrosani to Obernburg am Main | 728.40 mi (1,172.24 km) |
| Petrosani to Obernkirchen | 800.52 mi (1,288.32 km) |
| Petrosani to Oberschleissheim | 590.81 mi (950.81 km) |
| Petrosani to Oberstdorf | 638.04 mi (1,026.83 km) |
| Petrosani to Obertraubling | 579.90 mi (933.26 km) |
| Petrosani to Obertshausen | 746.57 mi (1,201.48 km) |
| Petrosani to Oberursel | 760.47 mi (1,223.85 km) |
| Petrosani to Ochsenfurt | 685.08 mi (1,102.53 km) |
| Petrosani to Ochsenhausen | 660.71 mi (1,063.32 km) |
| Petrosani to Ochtrup | 870.28 mi (1,400.59 km) |
| Petrosani to Odenthal | 840.60 mi (1,352.82 km) |
| Petrosani to Oelde | 822.30 mi (1,323.36 km) |
| Petrosani to Oelsnitz | 622.59 mi (1,001.96 km) |
| Petrosani to Oer-Erkenschwick | 851.43 mi (1,370.24 km) |
