| Opatija to Obernburg am Main | 393.18 mi (632.77 km) |
| Opatija to Obernkirchen | 533.61 mi (858.76 km) |
| Opatija to Oberschleissheim | 239.40 mi (385.28 km) |
| Opatija to Oberstdorf | 239.37 mi (385.23 km) |
| Opatija to Obertraubling | 270.23 mi (434.89 km) |
| Opatija to Obertshausen | 413.98 mi (666.24 km) |
| Opatija to Oberursel | 428.52 mi (689.64 km) |
| Opatija to Ochsenfurt | 357.66 mi (575.60 km) |
| Opatija to Ochsenhausen | 279.80 mi (450.29 km) |
| Opatija to Ochtrup | 574.10 mi (923.93 km) |
| Opatija to Odenthal | 513.91 mi (827.06 km) |
| Opatija to Oelde | 529.40 mi (851.98 km) |
| Opatija to Oelsnitz | 364.84 mi (587.15 km) |
| Opatija to Oer-Erkenschwick | 541.88 mi (872.07 km) |
| Opatija to Oerlinghausen | 525.16 mi (845.16 km) |
