| Saint-Nazaire to Somma Lombardo | 530.30 mi (853.44 km) |
| Saint-Nazaire to Somma Vesuviana | 934.75 mi (1,504.33 km) |
| Saint-Nazaire to Sommacampagna | 635.68 mi (1,023.03 km) |
| Saint-Nazaire to Sona | 634.26 mi (1,020.74 km) |
| Saint-Nazaire to Sondrio | 576.83 mi (928.32 km) |
| Saint-Nazaire to Sora | 867.40 mi (1,395.94 km) |
| Saint-Nazaire to Sorbolo | 629.03 mi (1,012.32 km) |
| Saint-Nazaire to Soresina | 591.88 mi (952.54 km) |
| Saint-Nazaire to Sorisole | 573.80 mi (923.44 km) |
| Saint-Nazaire to Sorrento | 941.52 mi (1,515.23 km) |
| Saint-Nazaire to Sorso | 697.06 mi (1,121.82 km) |
| Saint-Nazaire to Sortino | 1,121.07 mi (1,804.18 km) |
| Saint-Nazaire to Soverato Marina | 1,114.50 mi (1,793.61 km) |
| Saint-Nazaire to Sovicille | 708.34 mi (1,139.97 km) |
| Saint-Nazaire to Spello | 782.10 mi (1,258.66 km) |
