| Ostend to Somma Lombardo | 465.32 mi (748.85 km) |
| Ostend to Somma Vesuviana | 901.50 mi (1,450.83 km) |
| Ostend to Sommacampagna | 542.37 mi (872.86 km) |
| Ostend to Sona | 540.07 mi (869.17 km) |
| Ostend to Sondrio | 471.30 mi (758.48 km) |
| Ostend to Sora | 829.35 mi (1,334.71 km) |
| Ostend to Sorbolo | 560.89 mi (902.67 km) |
| Ostend to Soresina | 519.37 mi (835.85 km) |
| Ostend to Sorisole | 488.45 mi (786.09 km) |
| Ostend to Sorrento | 913.82 mi (1,470.65 km) |
| Ostend to Sorso | 769.35 mi (1,238.14 km) |
| Ostend to Sortino | 1,138.46 mi (1,832.17 km) |
| Ostend to Soverato Marina | 1,089.51 mi (1,753.40 km) |
| Ostend to Sovicille | 672.25 mi (1,081.89 km) |
| Ostend to Spello | 729.62 mi (1,174.21 km) |
