| Boadilla del Monte to Solofra | 980.60 mi (1,578.13 km) |
| Boadilla del Monte to Somma Lombardo | 730.96 mi (1,176.37 km) |
| Boadilla del Monte to Somma Vesuviana | 958.87 mi (1,543.15 km) |
| Boadilla del Monte to Sommacampagna | 819.59 mi (1,319.00 km) |
| Boadilla del Monte to Sona | 819.61 mi (1,319.03 km) |
| Boadilla del Monte to Sondrio | 796.16 mi (1,281.29 km) |
| Boadilla del Monte to Sora | 914.15 mi (1,471.18 km) |
| Boadilla del Monte to Sorbolo | 788.75 mi (1,269.36 km) |
| Boadilla del Monte to Soresina | 771.65 mi (1,241.85 km) |
| Boadilla del Monte to Sorisole | 774.50 mi (1,246.44 km) |
| Boadilla del Monte to Sorrento | 956.92 mi (1,540.01 km) |
| Boadilla del Monte to Sorso | 653.23 mi (1,051.28 km) |
| Boadilla del Monte to Sortino | 1,040.49 mi (1,674.51 km) |
| Boadilla del Monte to Soverato Marina | 1,092.27 mi (1,757.83 km) |
| Boadilla del Monte to Sovicille | 801.39 mi (1,289.71 km) |
