| Watford to Benavente | 965.61 mi (1,553.99 km) |
| Watford to Bombarral | 953.74 mi (1,534.90 km) |
| Watford to Bougado | 810.61 mi (1,304.56 km) |
| Watford to Braga | 794.21 mi (1,278.16 km) |
| Watford to Braganca | 743.50 mi (1,196.55 km) |
| Watford to Cabeceiras de Basto | 786.39 mi (1,265.58 km) |
| Watford to Cacem | 988.59 mi (1,590.98 km) |
| Watford to Cadaval | 954.78 mi (1,536.57 km) |
| Watford to Caldas da Rainha | 944.51 mi (1,520.04 km) |
| Watford to Calheta | 1,556.22 mi (2,504.49 km) |
| Watford to Camara de Lobos | 1,553.01 mi (2,499.32 km) |
| Watford to Canico | 1,552.90 mi (2,499.14 km) |
| Watford to Cantanhede | 873.56 mi (1,405.85 km) |
| Watford to Carregal do Sal | 855.72 mi (1,377.14 km) |
| Watford to Cartaxo | 953.54 mi (1,534.58 km) |
