| Welwyn Garden City to Jozefow | 909.02 mi (1,462.93 km) |
| Welwyn Garden City to Kalisz | 779.05 mi (1,253.75 km) |
| Welwyn Garden City to Kamien Pomorski | 640.24 mi (1,030.37 km) |
| Welwyn Garden City to Kamienna Gora | 703.14 mi (1,131.60 km) |
| Welwyn Garden City to Karczew | 910.16 mi (1,464.75 km) |
| Welwyn Garden City to Kartuzy | 780.86 mi (1,256.67 km) |
| Welwyn Garden City to Katowice | 838.88 mi (1,350.05 km) |
| Welwyn Garden City to Kedzierzyn-Kozle | 802.55 mi (1,291.58 km) |
| Welwyn Garden City to Kepno | 779.84 mi (1,255.03 km) |
| Welwyn Garden City to Ketrzyn | 908.29 mi (1,461.76 km) |
| Welwyn Garden City to Kety | 854.20 mi (1,374.71 km) |
| Welwyn Garden City to Kielce | 898.14 mi (1,445.42 km) |
| Welwyn Garden City to Kielczow | 747.25 mi (1,202.58 km) |
| Welwyn Garden City to Klobuck | 825.06 mi (1,327.80 km) |
| Welwyn Garden City to Klodzko | 734.93 mi (1,182.76 km) |
