| Boston to Saint-Nazaire | 405.61 mi (652.76 km) |
| Boston to Saint-Omer | 182.00 mi (292.90 km) |
| Boston to Saint-Orens-de-Gameville | 654.92 mi (1,053.99 km) |
| Boston to Saint-Ouen | 298.74 mi (480.78 km) |
| Boston to Saint-Ouen-l'Aumone | 286.85 mi (461.63 km) |
| Boston to Saint-Paul-les-Dax | 640.74 mi (1,031.17 km) |
| Boston to Saint-Paul-Trois-Chateaux | 634.41 mi (1,020.98 km) |
| Boston to Saint-Philbert-de-Grand-Lieu | 416.56 mi (670.39 km) |
| Boston to Saint-Pierre-des-Corps | 387.18 mi (623.10 km) |
| Boston to Saint-Pierre-du-Mont | 628.57 mi (1,011.59 km) |
| Boston to Saint-Pierre-du-Perray | 320.68 mi (516.08 km) |
| Boston to Saint-Pol-sur-Mer | 167.72 mi (269.92 km) |
| Boston to Saint-Priest | 549.93 mi (885.02 km) |
| Boston to Saint-Quentin | 258.69 mi (416.32 km) |
| Boston to Saint-Rambert | 550.82 mi (886.46 km) |
