| Watford to Bicaz | 1,230.38 mi (1,980.11 km) |
| Watford to Bistrita | 1,155.98 mi (1,860.36 km) |
| Watford to Blaj | 1,160.51 mi (1,867.66 km) |
| Watford to Bocsa | 1,095.40 mi (1,762.88 km) |
| Watford to Boldesti-Scaeni | 1,288.35 mi (2,073.40 km) |
| Watford to Bolintin Vale | 1,297.66 mi (2,088.39 km) |
| Watford to Borsa | 1,148.23 mi (1,847.90 km) |
| Watford to Botosani | 1,231.60 mi (1,982.06 km) |
| Watford to Brad | 1,114.57 mi (1,793.72 km) |
| Watford to Bragadiru | 1,309.58 mi (2,107.57 km) |
| Watford to Braila | 1,361.76 mi (2,191.55 km) |
| Watford to Brasov | 1,249.21 mi (2,010.40 km) |
| Watford to Breaza | 1,267.38 mi (2,039.66 km) |
| Watford to Bucharest | 1,312.73 mi (2,112.64 km) |
| Watford to Buftea | 1,301.30 mi (2,094.23 km) |
