| Opatija to Chitila | 573.85 mi (923.52 km) |
| Opatija to Cisnadie | 477.28 mi (768.11 km) |
| Opatija to Cluj-Napoca | 455.75 mi (733.46 km) |
| Opatija to Codlea | 539.68 mi (868.53 km) |
| Opatija to Comanesti | 588.69 mi (947.41 km) |
| Opatija to Comarnic | 550.54 mi (886.02 km) |
| Opatija to Constanta | 706.97 mi (1,137.76 km) |
| Opatija to Corabia | 513.42 mi (826.26 km) |
| Opatija to Costesti | 518.54 mi (834.51 km) |
| Opatija to Covasna | 575.22 mi (925.73 km) |
| Opatija to Craiova | 471.11 mi (758.17 km) |
| Opatija to Cristuru Secuiesc | 520.81 mi (838.16 km) |
| Opatija to Cugir | 439.42 mi (707.18 km) |
| Opatija to Cumpana | 703.97 mi (1,132.92 km) |
| Opatija to Curtea de Arges | 504.82 mi (812.43 km) |
