| Santander to Marasesti | 1,524.32 mi (2,453.16 km) |
| Santander to Marghita | 1,289.59 mi (2,075.39 km) |
| Santander to Marginea | 1,453.55 mi (2,339.26 km) |
| Santander to Matca | 1,539.04 mi (2,476.85 km) |
| Santander to Medgidia | 1,588.33 mi (2,556.17 km) |
| Santander to Media | 1,385.22 mi (2,229.29 km) |
| Santander to Miercurea-Ciuc | 1,453.81 mi (2,339.69 km) |
| Santander to Mioveni | 1,419.90 mi (2,285.10 km) |
| Santander to Mizil | 1,492.42 mi (2,401.82 km) |
| Santander to Moinesti | 1,485.98 mi (2,391.46 km) |
| Santander to Moisei | 1,393.15 mi (2,242.05 km) |
| Santander to Moldova Noua | 1,261.72 mi (2,030.54 km) |
| Santander to Moreni | 1,453.92 mi (2,339.87 km) |
| Santander to Motru | 1,325.02 mi (2,132.41 km) |
| Santander to Murfatlar | 1,596.38 mi (2,569.12 km) |
