| Birsfelden to Solofra | 585.75 mi (942.67 km) |
| Birsfelden to Somma Lombardo | 138.94 mi (223.60 km) |
| Birsfelden to Somma Vesuviana | 571.29 mi (919.40 km) |
| Birsfelden to Sommacampagna | 213.76 mi (344.01 km) |
| Birsfelden to Sona | 211.55 mi (340.46 km) |
| Birsfelden to Sondrio | 142.83 mi (229.87 km) |
| Birsfelden to Sora | 499.13 mi (803.26 km) |
| Birsfelden to Sorbolo | 230.70 mi (371.27 km) |
| Birsfelden to Soresina | 189.32 mi (304.68 km) |
| Birsfelden to Sorisole | 158.23 mi (254.64 km) |
| Birsfelden to Sorrento | 583.61 mi (939.23 km) |
| Birsfelden to Sorso | 469.10 mi (754.95 km) |
| Birsfelden to Sortino | 810.35 mi (1,304.14 km) |
| Birsfelden to Soverato Marina | 759.36 mi (1,222.07 km) |
| Birsfelden to Sovicille | 342.97 mi (551.96 km) |
