| Heerlen to Kocaeli | 1,338.90 mi (2,154.75 km) |
| Heerlen to Konak | 1,341.29 mi (2,158.61 km) |
| Heerlen to Konakli | 1,613.03 mi (2,595.92 km) |
| Heerlen to Konya | 1,574.18 mi (2,533.39 km) |
| Heerlen to Koprukoy | 1,872.94 mi (3,014.20 km) |
| Heerlen to Korfez | 1,330.55 mi (2,141.32 km) |
| Heerlen to Korkut | 1,920.25 mi (3,090.35 km) |
| Heerlen to Kose | 1,768.32 mi (2,845.84 km) |
| Heerlen to Kovancilar | 1,839.58 mi (2,960.52 km) |
| Heerlen to Koyulhisar | 1,686.92 mi (2,714.83 km) |
| Heerlen to Kozan | 1,727.06 mi (2,779.43 km) |
| Heerlen to Kozlu | 1,385.26 mi (2,229.36 km) |
| Heerlen to Kozluk | 1,931.05 mi (3,107.73 km) |
| Heerlen to Kucuk Dalyan | 1,799.94 mi (2,896.72 km) |
| Heerlen to Kucukcekmece | 1,283.49 mi (2,065.58 km) |
