| Watford to Santa Venerina | 1,225.16 mi (1,971.70 km) |
| Watford to Santeramo in Colle | 1,106.45 mi (1,780.66 km) |
| Watford to Santo Stefano di Magra | 702.98 mi (1,131.33 km) |
| Watford to Santo Stino di Livenza | 721.66 mi (1,161.39 km) |
| Watford to Sarezzo | 636.11 mi (1,023.72 km) |
| Watford to Sarno | 1,033.16 mi (1,662.72 km) |
| Watford to Saronno | 598.29 mi (962.85 km) |
| Watford to Sarzana | 707.00 mi (1,137.81 km) |
| Watford to Sassari | 866.61 mi (1,394.68 km) |
| Watford to Sasso Marconi | 733.81 mi (1,180.95 km) |
| Watford to Sassuolo | 710.60 mi (1,143.60 km) |
| Watford to Sava | 1,154.97 mi (1,858.75 km) |
| Watford to Saviano | 1,024.50 mi (1,648.78 km) |
| Watford to Savigliano | 608.52 mi (979.32 km) |
| Watford to Savignano sul Panaro | 722.33 mi (1,162.47 km) |
