| Saint-Omer to Settimo Torinese | 463.88 mi (746.54 km) |
| Saint-Omer to Seveso | 473.64 mi (762.25 km) |
| Saint-Omer to Sezze | 820.50 mi (1,320.46 km) |
| Saint-Omer to Siano | 909.26 mi (1,463.32 km) |
| Saint-Omer to Siena | 666.83 mi (1,073.15 km) |
| Saint-Omer to Signa | 634.20 mi (1,020.64 km) |
| Saint-Omer to Silea | 580.07 mi (933.54 km) |
| Saint-Omer to Silvi Paese | 796.32 mi (1,281.55 km) |
| Saint-Omer to Sinalunga | 684.58 mi (1,101.72 km) |
| Saint-Omer to Siniscola | 788.40 mi (1,268.80 km) |
| Saint-Omer to Sinnai | 859.49 mi (1,383.22 km) |
| Saint-Omer to Siracusa | 1,142.50 mi (1,838.68 km) |
| Saint-Omer to Solaro | 473.52 mi (762.06 km) |
| Saint-Omer to Soliera | 577.60 mi (929.55 km) |
| Saint-Omer to Solofra | 912.45 mi (1,468.45 km) |
