| Opatija to Kocaeli | 847.69 mi (1,364.22 km) |
| Opatija to Konak | 813.13 mi (1,308.61 km) |
| Opatija to Konakli | 1,095.01 mi (1,762.25 km) |
| Opatija to Konya | 1,068.32 mi (1,719.29 km) |
| Opatija to Koprukoy | 1,441.28 mi (2,319.51 km) |
| Opatija to Korfez | 838.45 mi (1,349.36 km) |
| Opatija to Korkut | 1,473.73 mi (2,371.74 km) |
| Opatija to Kose | 1,327.44 mi (2,136.30 km) |
| Opatija to Kovancilar | 1,382.43 mi (2,224.80 km) |
| Opatija to Koyulhisar | 1,237.04 mi (1,990.82 km) |
| Opatija to Kozan | 1,235.20 mi (1,987.86 km) |
| Opatija to Kozlu | 914.62 mi (1,471.94 km) |
| Opatija to Kozluk | 1,477.13 mi (2,377.21 km) |
| Opatija to Kucuk Dalyan | 1,300.02 mi (2,092.18 km) |
| Opatija to Kucukcekmece | 788.24 mi (1,268.56 km) |
