| Keystone to Solofra | 5,333.08 mi (8,582.76 km) |
| Keystone to Somma Lombardo | 4,914.82 mi (7,909.64 km) |
| Keystone to Somma Vesuviana | 5,312.50 mi (8,549.65 km) |
| Keystone to Sommacampagna | 5,018.61 mi (8,076.67 km) |
| Keystone to Sona | 5,016.97 mi (8,074.04 km) |
| Keystone to Sondrio | 4,954.74 mi (7,973.88 km) |
| Keystone to Sora | 5,248.85 mi (8,447.21 km) |
| Keystone to Sorbolo | 5,015.31 mi (8,071.37 km) |
| Keystone to Soresina | 4,977.03 mi (8,009.76 km) |
| Keystone to Sorisole | 4,956.35 mi (7,976.47 km) |
| Keystone to Sorrento | 5,316.94 mi (8,556.79 km) |
| Keystone to Sorso | 5,035.59 mi (8,103.99 km) |
| Keystone to Sortino | 5,455.59 mi (8,779.92 km) |
| Keystone to Soverato Marina | 5,480.89 mi (8,820.64 km) |
| Keystone to Sovicille | 5,093.52 mi (8,197.23 km) |
