| Middle River to Solofra | 4,582.80 mi (7,375.31 km) |
| Middle River to Somma Lombardo | 4,147.84 mi (6,675.30 km) |
| Middle River to Somma Vesuviana | 4,563.11 mi (7,343.61 km) |
| Middle River to Sommacampagna | 4,248.98 mi (6,838.07 km) |
| Middle River to Sona | 4,247.17 mi (6,835.16 km) |
| Middle River to Sondrio | 4,182.31 mi (6,730.78 km) |
| Middle River to Sora | 4,496.16 mi (7,235.88 km) |
| Middle River to Sorbolo | 4,250.04 mi (6,839.77 km) |
| Middle River to Soresina | 4,210.21 mi (6,775.67 km) |
| Middle River to Sorisole | 4,187.07 mi (6,738.43 km) |
| Middle River to Sorrento | 4,569.32 mi (7,353.61 km) |
| Middle River to Sorso | 4,302.76 mi (6,924.62 km) |
| Middle River to Sortino | 4,729.42 mi (7,611.27 km) |
| Middle River to Soverato Marina | 4,739.68 mi (7,627.77 km) |
| Middle River to Sovicille | 4,336.59 mi (6,979.06 km) |
