| Boulogne-Billancourt to Somma Lombardo | 372.84 mi (600.02 km) |
| Boulogne-Billancourt to Somma Vesuviana | 810.30 mi (1,304.05 km) |
| Boulogne-Billancourt to Sommacampagna | 468.82 mi (754.50 km) |
| Boulogne-Billancourt to Sona | 466.88 mi (751.37 km) |
| Boulogne-Billancourt to Sondrio | 400.65 mi (644.78 km) |
| Boulogne-Billancourt to Sora | 738.73 mi (1,188.87 km) |
| Boulogne-Billancourt to Sorbolo | 475.42 mi (765.12 km) |
| Boulogne-Billancourt to Soresina | 433.98 mi (698.42 km) |
| Boulogne-Billancourt to Sorisole | 407.89 mi (656.44 km) |
| Boulogne-Billancourt to Sorrento | 820.48 mi (1,320.43 km) |
| Boulogne-Billancourt to Sorso | 635.71 mi (1,023.07 km) |
| Boulogne-Billancourt to Sortino | 1,030.44 mi (1,658.32 km) |
| Boulogne-Billancourt to Soverato Marina | 997.80 mi (1,605.81 km) |
| Boulogne-Billancourt to Sovicille | 576.38 mi (927.60 km) |
| Boulogne-Billancourt to Spello | 642.93 mi (1,034.69 km) |
