| Somain to Saint-Nazaire | 328.31 mi (528.36 km) |
| Somain to Saint-Omer | 52.27 mi (84.12 km) |
| Somain to Saint-Orens-de-Gameville | 477.37 mi (768.26 km) |
| Somain to Saint-Ouen | 108.46 mi (174.54 km) |
| Somain to Saint-Ouen-l'Aumone | 104.67 mi (168.46 km) |
| Somain to Saint-Paul-les-Dax | 501.37 mi (806.88 km) |
| Somain to Saint-Paul-Trois-Chateaux | 420.93 mi (677.43 km) |
| Somain to Saint-Philbert-de-Grand-Lieu | 320.88 mi (516.41 km) |
| Somain to Saint-Pierre-des-Corps | 235.48 mi (378.97 km) |
| Somain to Saint-Pierre-du-Mont | 481.56 mi (775.00 km) |
| Somain to Saint-Pierre-du-Perray | 125.57 mi (202.08 km) |
| Somain to Saint-Pol-sur-Mer | 62.03 mi (99.83 km) |
| Somain to Saint-Priest | 331.03 mi (532.74 km) |
| Somain to Saint-Quentin | 35.16 mi (56.59 km) |
| Somain to Saint-Rambert | 338.58 mi (544.89 km) |
