| Willebroek to Kobarid | 535.67 mi (862.08 km) |
| Willebroek to Kobilje | 623.82 mi (1,003.94 km) |
| Willebroek to Kocevje | 609.37 mi (980.68 km) |
| Willebroek to Komen | 561.93 mi (904.34 km) |
| Willebroek to Komenda | 572.27 mi (920.99 km) |
| Willebroek to Koper | 574.16 mi (924.02 km) |
| Willebroek to Kostanjevica na Krki | 620.93 mi (999.29 km) |
| Willebroek to Kostel | 617.39 mi (993.59 km) |
| Willebroek to Kozje | 616.09 mi (991.50 km) |
| Willebroek to Kranj | 564.79 mi (908.95 km) |
| Willebroek to Kranjska Gora | 532.42 mi (856.84 km) |
| Willebroek to Krizevci | 618.42 mi (995.26 km) |
| Willebroek to Krsko | 618.58 mi (995.50 km) |
| Willebroek to Kuzma | 605.80 mi (974.95 km) |
| Willebroek to Lasko | 600.51 mi (966.43 km) |
