| Watford to Sereflikochisar | 1,845.46 mi (2,969.98 km) |
| Watford to Serik | 1,839.02 mi (2,959.62 km) |
| Watford to Serinhisar | 1,734.52 mi (2,791.44 km) |
| Watford to Serinyol | 2,071.99 mi (3,334.54 km) |
| Watford to Seydisehir | 1,845.50 mi (2,970.05 km) |
| Watford to Seyhan | 2,007.78 mi (3,231.21 km) |
| Watford to Seyitgazi | 1,706.06 mi (2,745.64 km) |
| Watford to Siirt | 2,242.76 mi (3,609.37 km) |
| Watford to Sile | 1,586.89 mi (2,553.86 km) |
| Watford to Silifke | 1,978.80 mi (3,184.57 km) |
| Watford to Silivri | 1,535.05 mi (2,470.42 km) |
| Watford to Silopi | 2,294.56 mi (3,692.74 km) |
| Watford to Simav | 1,652.92 mi (2,660.11 km) |
| Watford to Sinanpasa | 1,719.27 mi (2,766.89 km) |
| Watford to Sindirgi | 1,613.29 mi (2,596.34 km) |
