| Willebroek to Somma Lombardo | 421.61 mi (678.51 km) |
| Willebroek to Somma Vesuviana | 852.68 mi (1,372.26 km) |
| Willebroek to Sommacampagna | 491.86 mi (791.58 km) |
| Willebroek to Sona | 489.51 mi (787.80 km) |
| Willebroek to Sondrio | 421.25 mi (677.94 km) |
| Willebroek to Sora | 780.76 mi (1,256.50 km) |
| Willebroek to Sorbolo | 513.33 mi (826.13 km) |
| Willebroek to Soresina | 472.44 mi (760.32 km) |
| Willebroek to Sorisole | 440.71 mi (709.26 km) |
| Willebroek to Sorrento | 865.55 mi (1,392.97 km) |
| Willebroek to Sorso | 737.45 mi (1,186.81 km) |
| Willebroek to Sortino | 1,093.92 mi (1,760.49 km) |
| Willebroek to Soverato Marina | 1,040.06 mi (1,673.82 km) |
| Willebroek to Sovicille | 626.44 mi (1,008.16 km) |
| Willebroek to Spello | 680.61 mi (1,095.34 km) |
