| Santander to Marsala | 935.06 mi (1,504.83 km) |
| Santander to Marsciano | 812.57 mi (1,307.71 km) |
| Santander to Martano | 1,156.51 mi (1,861.22 km) |
| Santander to Martellago | 798.25 mi (1,284.66 km) |
| Santander to Martina Franca | 1,097.57 mi (1,766.37 km) |
| Santander to Martinengo | 683.44 mi (1,099.90 km) |
| Santander to Martinsicuro | 892.19 mi (1,435.84 km) |
| Santander to Mascali | 1,069.17 mi (1,720.66 km) |
| Santander to Mascalucia | 1,067.87 mi (1,718.57 km) |
| Santander to Masera di Padova | 783.01 mi (1,260.13 km) |
| Santander to Maserada sul Piave | 807.16 mi (1,299.00 km) |
| Santander to Massa | 695.97 mi (1,120.06 km) |
| Santander to Massa Lombarda | 778.79 mi (1,253.34 km) |
| Santander to Massafra | 1,089.11 mi (1,752.75 km) |
| Santander to Massalubrense | 950.10 mi (1,529.03 km) |
