| Boulogne-sur-Mer to Selvazzano Dentro | 596.45 mi (959.90 km) |
| Boulogne-sur-Mer to Senago | 495.88 mi (798.05 km) |
| Boulogne-sur-Mer to Senigallia | 727.40 mi (1,170.63 km) |
| Boulogne-sur-Mer to Seravezza | 614.55 mi (989.02 km) |
| Boulogne-sur-Mer to Seregno | 494.60 mi (795.98 km) |
| Boulogne-sur-Mer to Seriate | 509.92 mi (820.63 km) |
| Boulogne-sur-Mer to Sermoneta | 833.69 mi (1,341.69 km) |
| Boulogne-sur-Mer to Serramanna | 857.52 mi (1,380.04 km) |
| Boulogne-sur-Mer to Serravalle Pistoiese | 638.54 mi (1,027.63 km) |
| Boulogne-sur-Mer to Sessa Aurunca | 880.89 mi (1,417.66 km) |
| Boulogne-sur-Mer to Sesto Calende | 472.21 mi (759.95 km) |
| Boulogne-sur-Mer to Sesto Fiorentino | 653.72 mi (1,052.06 km) |
| Boulogne-sur-Mer to Sesto San Giovanni | 501.68 mi (807.37 km) |
| Boulogne-sur-Mer to Sestri Levante | 574.36 mi (924.34 km) |
| Boulogne-sur-Mer to Sestu | 868.83 mi (1,398.25 km) |
