| Opatija to Kayapinar | 1,423.52 mi (2,290.93 km) |
| Opatija to Kayseri | 1,174.96 mi (1,890.92 km) |
| Opatija to Kemalpasa | 824.70 mi (1,327.23 km) |
| Opatija to Kemer | 1,037.42 mi (1,669.56 km) |
| Opatija to Keskin | 1,055.39 mi (1,698.48 km) |
| Opatija to Kilimli | 917.26 mi (1,476.18 km) |
| Opatija to Kilis | 1,323.68 mi (2,130.25 km) |
| Opatija to Kinik | 794.50 mi (1,278.63 km) |
| Opatija to Kirikkale | 1,045.27 mi (1,682.19 km) |
| Opatija to Kirkagac | 806.68 mi (1,298.23 km) |
| Opatija to Kirklareli | 692.56 mi (1,114.56 km) |
| Opatija to Kirsehir | 1,098.51 mi (1,767.88 km) |
| Opatija to Kizilpinar | 741.24 mi (1,192.91 km) |
| Opatija to Kiziltepe | 1,468.10 mi (2,362.68 km) |
| Opatija to Kocaali | 882.58 mi (1,420.38 km) |
