| Opatija to Cologno al Serio | 223.57 mi (359.80 km) |
| Opatija to Cologno Monzese | 243.82 mi (392.40 km) |
| Opatija to Colorno | 192.88 mi (310.41 km) |
| Opatija to Comacchio | 112.26 mi (180.66 km) |
| Opatija to Comiso | 579.44 mi (932.52 km) |
| Opatija to Como | 254.27 mi (409.22 km) |
| Opatija to Concordia Sagittaria | 76.28 mi (122.76 km) |
| Opatija to Concorezzo | 241.18 mi (388.14 km) |
| Opatija to Conegliano | 104.07 mi (167.48 km) |
| Opatija to Conselice | 133.20 mi (214.37 km) |
| Opatija to Conselve | 118.49 mi (190.69 km) |
| Opatija to Conversano | 333.39 mi (536.53 km) |
| Opatija to Copertino | 398.25 mi (640.91 km) |
| Opatija to Copparo | 123.93 mi (199.45 km) |
| Opatija to Corato | 307.73 mi (495.24 km) |
