| Castrop-Rauxel to Karis | 861.36 mi (1,386.22 km) |
| Castrop-Rauxel to Karkkila | 895.51 mi (1,441.18 km) |
| Castrop-Rauxel to Kauhajoki | 932.42 mi (1,500.58 km) |
| Castrop-Rauxel to Kauhava | 985.28 mi (1,585.65 km) |
| Castrop-Rauxel to Kauniainen | 897.32 mi (1,444.10 km) |
| Castrop-Rauxel to Kemi | 1,151.20 mi (1,852.68 km) |
| Castrop-Rauxel to Kemijarvi | 1,254.94 mi (2,019.63 km) |
| Castrop-Rauxel to Kempele | 1,127.01 mi (1,813.75 km) |
| Castrop-Rauxel to Kerava | 914.81 mi (1,472.24 km) |
| Castrop-Rauxel to Keuruu | 982.61 mi (1,581.36 km) |
| Castrop-Rauxel to Kiiminki | 1,143.42 mi (1,840.15 km) |
| Castrop-Rauxel to Kirkkonummi | 884.44 mi (1,423.36 km) |
| Castrop-Rauxel to Kitee | 1,118.84 mi (1,800.60 km) |
| Castrop-Rauxel to Kiuruvesi | 1,090.89 mi (1,755.61 km) |
| Castrop-Rauxel to Kivisto | 904.64 mi (1,455.88 km) |
