| Boulogne-Billancourt to Settimo Torinese | 364.87 mi (587.20 km) |
| Boulogne-Billancourt to Seveso | 391.29 mi (629.72 km) |
| Boulogne-Billancourt to Sezze | 730.08 mi (1,174.95 km) |
| Boulogne-Billancourt to Siano | 823.05 mi (1,324.57 km) |
| Boulogne-Billancourt to Siena | 578.19 mi (930.51 km) |
| Boulogne-Billancourt to Signa | 547.66 mi (881.37 km) |
| Boulogne-Billancourt to Silea | 519.80 mi (836.54 km) |
| Boulogne-Billancourt to Silvi Paese | 717.72 mi (1,155.06 km) |
| Boulogne-Billancourt to Sinalunga | 597.60 mi (961.75 km) |
| Boulogne-Billancourt to Siniscola | 677.36 mi (1,090.10 km) |
| Boulogne-Billancourt to Sinnai | 743.06 mi (1,195.84 km) |
| Boulogne-Billancourt to Siracusa | 1,043.94 mi (1,680.05 km) |
| Boulogne-Billancourt to Solaro | 390.40 mi (628.29 km) |
| Boulogne-Billancourt to Soliera | 498.41 mi (802.12 km) |
| Boulogne-Billancourt to Solofra | 827.13 mi (1,331.13 km) |
