| Castel San Giorgio to Masquefa | 671.72 mi (1,081.03 km) |
| Castel San Giorgio to Matadepera | 660.86 mi (1,063.55 km) |
| Castel San Giorgio to Mazarron | 883.93 mi (1,422.55 km) |
| Castel San Giorgio to Meco | 943.16 mi (1,517.86 km) |
| Castel San Giorgio to Medina del Campo | 1,020.72 mi (1,642.69 km) |
| Castel San Giorgio to Medina Sidonia | 1,149.12 mi (1,849.33 km) |
| Castel San Giorgio to Mejorada del Campo | 947.63 mi (1,525.06 km) |
| Castel San Giorgio to Meliana | 798.45 mi (1,284.97 km) |
| Castel San Giorgio to Mengibar | 1,005.50 mi (1,618.19 km) |
| Castel San Giorgio to Merida | 1,120.67 mi (1,803.55 km) |
| Castel San Giorgio to Miajadas | 1,102.86 mi (1,774.88 km) |
| Castel San Giorgio to Mieres | 1,062.09 mi (1,709.27 km) |
| Castel San Giorgio to Miguelturra | 994.94 mi (1,601.20 km) |
| Castel San Giorgio to Mijas | 1,079.42 mi (1,737.15 km) |
| Castel San Giorgio to Miranda de Ebro | 916.90 mi (1,475.60 km) |
