| South San Francisco to Solofra | 6,379.09 mi (10,266.15 km) |
| South San Francisco to Somma Lombardo | 5,927.80 mi (9,539.88 km) |
| South San Francisco to Somma Vesuviana | 6,365.16 mi (10,243.73 km) |
| South San Francisco to Sommacampagna | 6,004.79 mi (9,663.77 km) |
| South San Francisco to Sona | 6,002.44 mi (9,659.99 km) |
| South San Francisco to Sondrio | 5,934.06 mi (9,549.94 km) |
| South San Francisco to Sora | 6,293.04 mi (10,127.68 km) |
| South San Francisco to Sorbolo | 6,024.64 mi (9,695.72 km) |
| South San Francisco to Soresina | 5,983.09 mi (9,628.86 km) |
| South San Francisco to Sorisole | 5,952.18 mi (9,579.10 km) |
| South San Francisco to Sorrento | 6,377.57 mi (10,263.70 km) |
| South San Francisco to Sorso | 6,194.74 mi (9,969.47 km) |
| South San Francisco to Sortino | 6,597.99 mi (10,618.44 km) |
| South San Francisco to Soverato Marina | 6,552.91 mi (10,545.89 km) |
| South San Francisco to Sovicille | 6,135.32 mi (9,873.85 km) |
