| Willebroek to Settimo Torinese | 438.83 mi (706.23 km) |
| Willebroek to Seveso | 433.82 mi (698.17 km) |
| Willebroek to Sezze | 779.49 mi (1,254.46 km) |
| Willebroek to Siano | 863.78 mi (1,390.12 km) |
| Willebroek to Siena | 626.69 mi (1,008.56 km) |
| Willebroek to Signa | 592.99 mi (954.33 km) |
| Willebroek to Silea | 521.31 mi (838.98 km) |
| Willebroek to Silvi Paese | 746.23 mi (1,200.95 km) |
| Willebroek to Sinalunga | 642.73 mi (1,034.38 km) |
| Willebroek to Siniscola | 768.52 mi (1,236.81 km) |
| Willebroek to Sinnai | 845.78 mi (1,361.15 km) |
| Willebroek to Siracusa | 1,106.01 mi (1,779.95 km) |
| Willebroek to Solaro | 434.32 mi (698.97 km) |
| Willebroek to Soliera | 531.95 mi (856.09 km) |
| Willebroek to Solofra | 866.23 mi (1,394.06 km) |
