| Duffel to Knurow | 622.53 mi (1,001.87 km) |
| Duffel to Kobylka | 717.60 mi (1,154.86 km) |
| Duffel to Kokoszki | 625.18 mi (1,006.13 km) |
| Duffel to Kolbuszowa | 755.84 mi (1,216.40 km) |
| Duffel to Kolno | 751.73 mi (1,209.79 km) |
| Duffel to Kolo | 608.94 mi (980.00 km) |
| Duffel to Kolobrzeg | 509.37 mi (819.76 km) |
| Duffel to Koluszki | 658.76 mi (1,060.17 km) |
| Duffel to Komorniki | 527.45 mi (848.85 km) |
| Duffel to Konin | 593.46 mi (955.09 km) |
| Duffel to Konskie | 687.81 mi (1,106.93 km) |
| Duffel to Konstancin-Jeziorna | 714.21 mi (1,149.41 km) |
| Duffel to Konstantynow Lodzki | 638.81 mi (1,028.06 km) |
| Duffel to Koronowo | 587.35 mi (945.25 km) |
| Duffel to Koscian | 524.61 mi (844.27 km) |
