| Saint-Omer to Somma Lombardo | 458.29 mi (737.55 km) |
| Saint-Omer to Somma Vesuviana | 897.36 mi (1,444.16 km) |
| Saint-Omer to Sommacampagna | 541.37 mi (871.26 km) |
| Saint-Omer to Sona | 539.16 mi (867.69 km) |
| Saint-Omer to Sondrio | 470.34 mi (756.94 km) |
| Saint-Omer to Sora | 825.15 mi (1,327.94 km) |
| Saint-Omer to Sorbolo | 556.76 mi (896.02 km) |
| Saint-Omer to Soresina | 514.90 mi (828.65 km) |
| Saint-Omer to Sorisole | 485.00 mi (780.54 km) |
| Saint-Omer to Sorrento | 909.08 mi (1,463.02 km) |
| Saint-Omer to Sorso | 751.18 mi (1,208.90 km) |
| Saint-Omer to Sortino | 1,129.67 mi (1,818.03 km) |
| Saint-Omer to Soverato Marina | 1,085.66 mi (1,747.20 km) |
| Saint-Omer to Sovicille | 665.85 mi (1,071.59 km) |
| Saint-Omer to Spello | 726.16 mi (1,168.64 km) |
