| Hemel Hempstead to Karditsa | 1,370.65 mi (2,205.84 km) |
| Hemel Hempstead to Kastoria | 1,290.04 mi (2,076.12 km) |
| Hemel Hempstead to Katerini | 1,348.74 mi (2,170.58 km) |
| Hemel Hempstead to Keratsini | 1,503.94 mi (2,420.35 km) |
| Hemel Hempstead to Kerkyra | 1,284.75 mi (2,067.60 km) |
| Hemel Hempstead to Kiato | 1,469.75 mi (2,365.33 km) |
| Hemel Hempstead to Kifisia | 1,505.50 mi (2,422.87 km) |
| Hemel Hempstead to Kilkis | 1,329.20 mi (2,139.14 km) |
| Hemel Hempstead to Komotini | 1,424.44 mi (2,292.42 km) |
| Hemel Hempstead to Korinthos | 1,479.93 mi (2,381.71 km) |
| Hemel Hempstead to Koropi | 1,516.84 mi (2,441.13 km) |
| Hemel Hempstead to Korydallos | 1,504.34 mi (2,420.99 km) |
| Hemel Hempstead to Kos | 1,696.41 mi (2,730.11 km) |
| Hemel Hempstead to Kozani | 1,319.95 mi (2,124.26 km) |
| Hemel Hempstead to Lagos | 1,410.30 mi (2,269.66 km) |
