| Watford to Zottegem | 189.38 mi (304.77 km) |
| Watford to Zulte | 173.12 mi (278.62 km) |
| Watford to Zwevegem | 171.80 mi (276.48 km) |
| Watford to Zwijndrecht | 205.89 mi (331.35 km) |
| Watford to Asenovgrad | 1,357.23 mi (2,184.25 km) |
| Watford to Aytos | 1,426.71 mi (2,296.07 km) |
| Watford to Balchik | 1,436.42 mi (2,311.70 km) |
| Watford to Bankya | 1,258.37 mi (2,025.15 km) |
| Watford to Bansko | 1,309.63 mi (2,107.65 km) |
| Watford to Berkovitsa | 1,235.55 mi (1,988.43 km) |
| Watford to Blagoevgrad | 1,286.17 mi (2,069.88 km) |
| Watford to Botevgrad | 1,276.42 mi (2,054.20 km) |
| Watford to Burgas | 1,443.73 mi (2,323.45 km) |
| Watford to Byala Slatina | 1,259.43 mi (2,026.86 km) |
| Watford to Chirpan | 1,368.06 mi (2,201.67 km) |
