| Watford to Kanjiza | 1,002.12 mi (1,612.75 km) |
| Watford to Kikinda | 1,026.85 mi (1,652.55 km) |
| Watford to Kladovo | 1,160.83 mi (1,868.18 km) |
| Watford to Knic | 1,110.74 mi (1,787.56 km) |
| Watford to Knjazevac | 1,196.97 mi (1,926.33 km) |
| Watford to Koceljeva | 1,051.80 mi (1,692.71 km) |
| Watford to Kosjeric | 1,075.30 mi (1,730.53 km) |
| Watford to Kovacica | 1,060.10 mi (1,706.07 km) |
| Watford to Kovin | 1,087.92 mi (1,750.84 km) |
| Watford to Kragujevac | 1,115.75 mi (1,795.62 km) |
| Watford to Kraljevo | 1,117.49 mi (1,798.43 km) |
| Watford to Krupanj | 1,038.34 mi (1,671.04 km) |
| Watford to Krusevac | 1,148.92 mi (1,849.00 km) |
| Watford to Kucevo | 1,126.78 mi (1,813.38 km) |
| Watford to Kula | 997.42 mi (1,605.20 km) |
