| Boston to Solofra | 1,089.42 mi (1,753.25 km) |
| Boston to Somma Lombardo | 637.77 mi (1,026.40 km) |
| Boston to Somma Vesuviana | 1,074.99 mi (1,730.03 km) |
| Boston to Sommacampagna | 716.03 mi (1,152.34 km) |
| Boston to Sona | 713.74 mi (1,148.65 km) |
| Boston to Sondrio | 644.97 mi (1,037.97 km) |
| Boston to Sora | 1,002.82 mi (1,613.88 km) |
| Boston to Sorbolo | 734.29 mi (1,181.73 km) |
| Boston to Soresina | 692.68 mi (1,114.76 km) |
| Boston to Sorisole | 661.93 mi (1,065.28 km) |
| Boston to Sorrento | 1,087.20 mi (1,749.68 km) |
| Boston to Sorso | 932.56 mi (1,500.81 km) |
| Boston to Sortino | 1,310.40 mi (2,108.88 km) |
| Boston to Soverato Marina | 1,263.07 mi (2,032.71 km) |
| Boston to Sovicille | 845.09 mi (1,360.05 km) |
