| Boulogne-sur-Mer to Santeramo in Colle | 998.31 mi (1,606.63 km) |
| Boulogne-sur-Mer to Santo Stefano di Magra | 596.01 mi (959.18 km) |
| Boulogne-sur-Mer to Santo Stino di Livenza | 614.26 mi (988.56 km) |
| Boulogne-sur-Mer to Sarezzo | 527.99 mi (849.71 km) |
| Boulogne-sur-Mer to Sarno | 925.48 mi (1,489.41 km) |
| Boulogne-sur-Mer to Saronno | 490.62 mi (789.57 km) |
| Boulogne-sur-Mer to Sarzana | 600.04 mi (965.68 km) |
| Boulogne-sur-Mer to Sassari | 767.01 mi (1,234.38 km) |
| Boulogne-sur-Mer to Sasso Marconi | 625.83 mi (1,007.18 km) |
| Boulogne-sur-Mer to Sassuolo | 602.72 mi (969.99 km) |
| Boulogne-sur-Mer to Sava | 1,046.84 mi (1,684.72 km) |
| Boulogne-sur-Mer to Saviano | 916.81 mi (1,475.47 km) |
| Boulogne-sur-Mer to Savigliano | 504.23 mi (811.48 km) |
| Boulogne-sur-Mer to Savignano sul Panaro | 614.39 mi (988.76 km) |
| Boulogne-sur-Mer to Savignano sul Rubicone | 680.23 mi (1,094.72 km) |
