| Opatija to Karakocan | 1,383.16 mi (2,225.98 km) |
| Opatija to Karakopru | 1,383.93 mi (2,227.22 km) |
| Opatija to Karaman | 1,128.51 mi (1,816.16 km) |
| Opatija to Karapinar | 1,122.37 mi (1,806.29 km) |
| Opatija to Karatas | 1,250.55 mi (2,012.56 km) |
| Opatija to Karatepe | 850.90 mi (1,369.39 km) |
| Opatija to Karayilan | 1,283.18 mi (2,065.08 km) |
| Opatija to Kargipinar | 1,203.00 mi (1,936.03 km) |
| Opatija to Karkamis | 1,359.98 mi (2,188.67 km) |
| Opatija to Karliova | 1,419.57 mi (2,284.57 km) |
| Opatija to Kars | 1,483.47 mi (2,387.42 km) |
| Opatija to Kartal | 809.91 mi (1,303.42 km) |
| Opatija to Kas | 1,017.90 mi (1,638.15 km) |
| Opatija to Kastamonu | 1,013.11 mi (1,630.44 km) |
| Opatija to Kavak | 1,129.91 mi (1,818.42 km) |
