| Grefrath to Kobarid | 481.42 mi (774.78 km) |
| Grefrath to Kobilje | 556.87 mi (896.20 km) |
| Grefrath to Kocevje | 553.30 mi (890.45 km) |
| Grefrath to Komen | 509.61 mi (820.14 km) |
| Grefrath to Komenda | 514.16 mi (827.46 km) |
| Grefrath to Koper | 523.53 mi (842.53 km) |
| Grefrath to Kostanjevica na Krki | 561.59 mi (903.80 km) |
| Grefrath to Kostel | 561.88 mi (904.25 km) |
| Grefrath to Kozje | 555.02 mi (893.22 km) |
| Grefrath to Kranj | 507.21 mi (816.27 km) |
| Grefrath to Kranjska Gora | 475.65 mi (765.49 km) |
| Grefrath to Krizevci | 552.83 mi (889.70 km) |
| Grefrath to Krsko | 558.46 mi (898.75 km) |
| Grefrath to Kuzma | 538.89 mi (867.25 km) |
| Grefrath to Lasko | 540.09 mi (869.19 km) |
