| Niederkassel to Kastoria | 986.03 mi (1,586.86 km) |
| Niederkassel to Katerini | 1,040.81 mi (1,675.02 km) |
| Niederkassel to Keratsini | 1,202.26 mi (1,934.85 km) |
| Niederkassel to Kerkyra | 992.77 mi (1,597.70 km) |
| Niederkassel to Kiato | 1,171.74 mi (1,885.74 km) |
| Niederkassel to Kifisia | 1,202.46 mi (1,935.17 km) |
| Niederkassel to Kilkis | 1,016.53 mi (1,635.95 km) |
| Niederkassel to Komotini | 1,104.12 mi (1,776.90 km) |
| Niederkassel to Korinthos | 1,181.44 mi (1,901.34 km) |
| Niederkassel to Koropi | 1,214.38 mi (1,954.36 km) |
| Niederkassel to Korydallos | 1,202.44 mi (1,935.14 km) |
| Niederkassel to Kos | 1,385.94 mi (2,230.46 km) |
| Niederkassel to Kozani | 1,014.82 mi (1,633.19 km) |
| Niederkassel to Lagos | 1,091.01 mi (1,755.82 km) |
| Niederkassel to Lamia | 1,112.18 mi (1,789.88 km) |
