| Hertford to Solofra | 1,035.91 mi (1,667.13 km) |
| Hertford to Somma Lombardo | 580.90 mi (934.87 km) |
| Hertford to Somma Vesuviana | 1,020.56 mi (1,642.43 km) |
| Hertford to Sommacampagna | 665.55 mi (1,071.10 km) |
| Hertford to Sona | 663.34 mi (1,067.55 km) |
| Hertford to Sondrio | 594.56 mi (956.85 km) |
| Hertford to Sora | 948.37 mi (1,526.26 km) |
| Hertford to Sorbolo | 680.25 mi (1,094.76 km) |
| Hertford to Soresina | 638.34 mi (1,027.31 km) |
| Hertford to Sorisole | 608.77 mi (979.72 km) |
| Hertford to Sorrento | 1,032.04 mi (1,660.91 km) |
| Hertford to Sorso | 863.56 mi (1,389.76 km) |
| Hertford to Sortino | 1,250.32 mi (2,012.19 km) |
| Hertford to Soverato Marina | 1,208.87 mi (1,945.50 km) |
| Hertford to Sovicille | 788.34 mi (1,268.71 km) |
