| Boulogne-sur-Mer to Santander | 562.53 mi (905.31 km) |
| Boulogne-sur-Mer to Santany | 789.16 mi (1,270.04 km) |
| Boulogne-sur-Mer to Santiago de Compostela | 723.20 mi (1,163.89 km) |
| Boulogne-sur-Mer to Santiago del Teide | 1,823.67 mi (2,934.91 km) |
| Boulogne-sur-Mer to Santiponce | 992.58 mi (1,597.40 km) |
| Boulogne-sur-Mer to Santomera | 884.72 mi (1,423.82 km) |
| Boulogne-sur-Mer to Santona | 556.72 mi (895.96 km) |
| Boulogne-sur-Mer to Santurce-Antiguo | 555.62 mi (894.18 km) |
| Boulogne-sur-Mer to Sarria | 694.61 mi (1,117.87 km) |
| Boulogne-sur-Mer to Sauzal | 1,801.97 mi (2,899.99 km) |
| Boulogne-sur-Mer to Sedavi | 786.70 mi (1,266.07 km) |
| Boulogne-sur-Mer to Segorbe | 758.20 mi (1,220.21 km) |
| Boulogne-sur-Mer to Segovia | 729.25 mi (1,173.62 km) |
| Boulogne-sur-Mer to Senmanat | 630.47 mi (1,014.64 km) |
| Boulogne-sur-Mer to Sesena | 777.37 mi (1,251.05 km) |
