| Boucau to Sin-le-Noble | 519.74 mi (836.45 km) |
| Boucau to Six-Fours-les-Plages | 368.38 mi (592.85 km) |
| Boucau to Soissons | 464.81 mi (748.03 km) |
| Boucau to Soisy-sous-Montmorency | 418.50 mi (673.52 km) |
| Boucau to Sollies-Pont | 378.75 mi (609.54 km) |
| Boucau to Somain | 522.72 mi (841.24 km) |
| Boucau to Sorgues | 318.99 mi (513.36 km) |
| Boucau to Sotteville-les-Rouen | 424.67 mi (683.45 km) |
| Boucau to Soyaux | 168.10 mi (270.53 km) |
| Boucau to Stains | 417.92 mi (672.58 km) |
| Boucau to Stiring-Wendel | 560.47 mi (902.00 km) |
| Boucau to Strasbourg | 563.41 mi (906.73 km) |
| Boucau to Sucy-en-Brie | 410.01 mi (659.84 km) |
| Boucau to Suresnes | 409.61 mi (659.20 km) |
| Boucau to Talant | 410.24 mi (660.22 km) |
