| Watford to Santarem | 946.20 mi (1,522.77 km) |
| Watford to Santiago do Cacem | 1,024.82 mi (1,649.29 km) |
| Watford to Santo Andre | 1,023.62 mi (1,647.36 km) |
| Watford to Santo Tirso | 808.78 mi (1,301.60 km) |
| Watford to Sao Bras de Alportel | 1,066.81 mi (1,716.86 km) |
| Watford to Sao Felix da Marinha | 830.95 mi (1,337.28 km) |
| Watford to Sao Joao da Madeira | 836.57 mi (1,346.33 km) |
| Watford to Sao Joao de Ver | 834.37 mi (1,342.78 km) |
| Watford to Sao Mamede de Infesta | 820.07 mi (1,319.77 km) |
| Watford to Sao Pedro do Sul | 836.92 mi (1,346.89 km) |
| Watford to Satao | 831.22 mi (1,337.72 km) |
| Watford to Seia | 850.55 mi (1,368.83 km) |
| Watford to Senhora da Hora | 822.09 mi (1,323.02 km) |
| Watford to Serpa | 1,009.77 mi (1,625.06 km) |
| Watford to Serta | 898.25 mi (1,445.59 km) |
