| Williamsport to Sestu | 4,340.32 mi (6,985.08 km) |
| Williamsport to Settimo Torinese | 4,075.47 mi (6,558.84 km) |
| Williamsport to Seveso | 4,116.21 mi (6,624.41 km) |
| Williamsport to Sezze | 4,433.34 mi (7,134.77 km) |
| Williamsport to Siano | 4,530.51 mi (7,291.15 km) |
| Williamsport to Siena | 4,291.14 mi (6,905.92 km) |
| Williamsport to Signa | 4,264.44 mi (6,862.95 km) |
| Williamsport to Silea | 4,247.51 mi (6,835.71 km) |
| Williamsport to Silvi Paese | 4,438.44 mi (7,142.98 km) |
| Williamsport to Sinalunga | 4,312.02 mi (6,939.52 km) |
| Williamsport to Siniscola | 4,320.24 mi (6,952.75 km) |
| Williamsport to Sinnai | 4,345.22 mi (6,992.96 km) |
| Williamsport to Siracusa | 4,705.10 mi (7,572.12 km) |
| Williamsport to Solaro | 4,114.93 mi (6,622.34 km) |
| Williamsport to Soliera | 4,222.88 mi (6,796.08 km) |
