| Watford to Klaukkala | 1,132.39 mi (1,822.40 km) |
| Watford to Kokkola | 1,195.59 mi (1,924.12 km) |
| Watford to Kontiolahti | 1,347.73 mi (2,168.97 km) |
| Watford to Korsholm | 1,130.41 mi (1,819.23 km) |
| Watford to Kotka | 1,204.83 mi (1,938.98 km) |
| Watford to Kouvola | 1,206.17 mi (1,941.14 km) |
| Watford to Kuhmo | 1,374.32 mi (2,211.76 km) |
| Watford to Kuopio | 1,287.64 mi (2,072.25 km) |
| Watford to Kurikka | 1,130.98 mi (1,820.14 km) |
| Watford to Kuusamo | 1,423.58 mi (2,291.03 km) |
| Watford to Kuusankoski | 1,204.56 mi (1,938.54 km) |
| Watford to Lahti | 1,175.81 mi (1,892.28 km) |
| Watford to Laitila | 1,052.18 mi (1,693.32 km) |
| Watford to Lapinlahti | 1,293.04 mi (2,080.95 km) |
| Watford to Lappeenranta | 1,257.54 mi (2,023.81 km) |
