| Portet-sur-Garonne to Somma Lombardo | 388.47 mi (625.17 km) |
| Portet-sur-Garonne to Somma Vesuviana | 690.84 mi (1,111.81 km) |
| Portet-sur-Garonne to Sommacampagna | 483.13 mi (777.52 km) |
| Portet-sur-Garonne to Sona | 482.83 mi (777.04 km) |
| Portet-sur-Garonne to Sondrio | 452.89 mi (728.85 km) |
| Portet-sur-Garonne to Sora | 632.62 mi (1,018.10 km) |
| Portet-sur-Garonne to Sorbolo | 457.02 mi (735.50 km) |
| Portet-sur-Garonne to Soresina | 434.36 mi (699.04 km) |
| Portet-sur-Garonne to Sorisole | 433.34 mi (697.40 km) |
| Portet-sur-Garonne to Sorrento | 693.62 mi (1,116.27 km) |
| Portet-sur-Garonne to Sorso | 412.48 mi (663.83 km) |
| Portet-sur-Garonne to Sortino | 839.70 mi (1,351.36 km) |
| Portet-sur-Garonne to Soverato Marina | 854.78 mi (1,375.63 km) |
| Portet-sur-Garonne to Sovicille | 493.31 mi (793.90 km) |
| Portet-sur-Garonne to Spello | 567.68 mi (913.59 km) |
