| Santander to Menen | 601.66 mi (968.28 km) |
| Santander to Merchtem | 640.38 mi (1,030.59 km) |
| Santander to Merelbeke | 629.23 mi (1,012.64 km) |
| Santander to Merksem | 660.89 mi (1,063.61 km) |
| Santander to Merksplas | 679.16 mi (1,093.00 km) |
| Santander to Mettet | 618.92 mi (996.06 km) |
| Santander to Meulebeke | 614.51 mi (988.96 km) |
| Santander to Middelkerke | 616.60 mi (992.31 km) |
| Santander to Mol | 676.59 mi (1,088.86 km) |
| Santander to Mons | 604.96 mi (973.59 km) |
| Santander to Montignies-le-Tilleul | 614.00 mi (988.15 km) |
| Santander to Moorslede | 605.56 mi (974.55 km) |
| Santander to Moortebeek | 637.32 mi (1,025.67 km) |
| Santander to Morlanwelz-Mariemont | 613.07 mi (986.64 km) |
| Santander to Mortsel | 657.50 mi (1,058.14 km) |
