| Boulogne-sur-Mer to Sin-le-Noble | 70.41 mi (113.32 km) |
| Boulogne-sur-Mer to Six-Fours-les-Plages | 562.78 mi (905.71 km) |
| Boulogne-sur-Mer to Soissons | 119.91 mi (192.97 km) |
| Boulogne-sur-Mer to Soisy-sous-Montmorency | 123.94 mi (199.46 km) |
| Boulogne-sur-Mer to Sollies-Pont | 560.74 mi (902.42 km) |
| Boulogne-sur-Mer to Somain | 77.45 mi (124.64 km) |
| Boulogne-sur-Mer to Sorgues | 488.44 mi (786.07 km) |
| Boulogne-sur-Mer to Sotteville-les-Rouen | 93.94 mi (151.18 km) |
| Boulogne-sur-Mer to Soyaux | 357.41 mi (575.19 km) |
| Boulogne-sur-Mer to Stains | 127.42 mi (205.07 km) |
| Boulogne-sur-Mer to Stiring-Wendel | 258.61 mi (416.19 km) |
| Boulogne-sur-Mer to Strasbourg | 311.53 mi (501.36 km) |
| Boulogne-sur-Mer to Sucy-en-Brie | 141.14 mi (227.14 km) |
| Boulogne-sur-Mer to Suresnes | 131.07 mi (210.94 km) |
| Boulogne-sur-Mer to Talant | 280.04 mi (450.67 km) |
