| Grefrath to Knurow | 544.11 mi (875.66 km) |
| Grefrath to Kobylka | 637.00 mi (1,025.15 km) |
| Grefrath to Kokoszki | 547.35 mi (880.88 km) |
| Grefrath to Kolbuszowa | 676.63 mi (1,088.93 km) |
| Grefrath to Kolno | 671.73 mi (1,081.04 km) |
| Grefrath to Kolo | 528.33 mi (850.27 km) |
| Grefrath to Kolobrzeg | 432.71 mi (696.39 km) |
| Grefrath to Koluszki | 578.24 mi (930.58 km) |
| Grefrath to Komorniki | 446.86 mi (719.15 km) |
| Grefrath to Konin | 512.86 mi (825.36 km) |
| Grefrath to Konskie | 607.64 mi (977.90 km) |
| Grefrath to Konstancin-Jeziorna | 633.60 mi (1,019.68 km) |
| Grefrath to Konstantynow Lodzki | 558.29 mi (898.48 km) |
| Grefrath to Koronowo | 507.64 mi (816.96 km) |
| Grefrath to Koscian | 444.00 mi (714.54 km) |
