| Opatija to Novi di Modena | 168.48 mi (271.15 km) |
| Opatija to Novi Ligure | 272.05 mi (437.82 km) |
| Opatija to Nuoro | 428.16 mi (689.06 km) |
| Opatija to Occhiobello | 135.55 mi (218.14 km) |
| Opatija to Oderzo | 92.73 mi (149.24 km) |
| Opatija to Oggiono | 241.44 mi (388.56 km) |
| Opatija to Olbia | 389.35 mi (626.59 km) |
| Opatija to Oleggio | 275.15 mi (442.81 km) |
| Opatija to Olgiate Comasco | 259.83 mi (418.16 km) |
| Opatija to Olgiate Olona | 263.17 mi (423.52 km) |
| Opatija to Omegna | 287.26 mi (462.31 km) |
| Opatija to Opera | 246.78 mi (397.15 km) |
| Opatija to Oppeano | 151.43 mi (243.71 km) |
| Opatija to Orbassano | 330.11 mi (531.26 km) |
| Opatija to Orbetello | 252.18 mi (405.85 km) |
