| Cities | Distance |
|---|---|
| Opatija to Navodari | 703.94 mi (1,132.88 km) |
| Opatija to Negresti-Oas | 466.88 mi (751.37 km) |
| Opatija to Nehoiu | 582.46 mi (937.37 km) |
| Opatija to Ocna Mures | 465.45 mi (749.07 km) |
| Opatija to Odobesti | 617.79 mi (994.23 km) |
| Opatija to Odorheiu Secuiesc | 533.59 mi (858.74 km) |
| Opatija to Oltenita | 611.24 mi (983.70 km) |
| Opatija to Onesti | 603.44 mi (971.14 km) |
| Opatija to Oradea | 383.55 mi (617.26 km) |
| Opatija to Orastie | 431.56 mi (694.53 km) |
| Opatija to Oravita | 360.08 mi (579.50 km) |
| Opatija to Orsova | 397.40 mi (639.55 km) |
| Opatija to Otelu Rosu | 390.54 mi (628.51 km) |
| Opatija to Otopeni | 577.64 mi (929.62 km) |
| Opatija to Ovidiu | 702.02 mi (1,129.79 km) |