| Watford to Jicin | 687.84 mi (1,106.97 km) |
| Watford to Jihlava | 717.67 mi (1,154.98 km) |
| Watford to Jindrichuv Hradec | 698.57 mi (1,124.24 km) |
| Watford to Jirkov | 605.28 mi (974.10 km) |
| Watford to Kadan | 599.70 mi (965.12 km) |
| Watford to Karlovy Vary | 585.11 mi (941.64 km) |
| Watford to Karvina | 834.70 mi (1,343.32 km) |
| Watford to Kladno | 639.02 mi (1,028.41 km) |
| Watford to Klasterec nad Ohri | 595.28 mi (958.00 km) |
| Watford to Klatovy | 620.27 mi (998.23 km) |
| Watford to Kolin | 688.32 mi (1,107.74 km) |
| Watford to Koprivnice | 822.62 mi (1,323.88 km) |
| Watford to Kralupy nad Vltavou | 646.49 mi (1,040.42 km) |
| Watford to Kraluv Dvur | 639.93 mi (1,029.86 km) |
| Watford to Krnov | 794.20 mi (1,278.15 km) |
