| Monte Porzio Catone to Masquefa | 562.85 mi (905.82 km) |
| Monte Porzio Catone to Matadepera | 551.34 mi (887.30 km) |
| Monte Porzio Catone to Mazarron | 799.53 mi (1,286.72 km) |
| Monte Porzio Catone to Meco | 837.52 mi (1,347.85 km) |
| Monte Porzio Catone to Medina del Campo | 910.77 mi (1,465.74 km) |
| Monte Porzio Catone to Medina Sidonia | 1,062.08 mi (1,709.25 km) |
| Monte Porzio Catone to Mejorada del Campo | 842.77 mi (1,356.31 km) |
| Monte Porzio Catone to Meliana | 701.98 mi (1,129.73 km) |
| Monte Porzio Catone to Mengibar | 913.83 mi (1,470.66 km) |
| Monte Porzio Catone to Merida | 1,020.78 mi (1,642.78 km) |
| Monte Porzio Catone to Miajadas | 1,002.03 mi (1,612.62 km) |
| Monte Porzio Catone to Mieres | 944.81 mi (1,520.52 km) |
| Monte Porzio Catone to Miguelturra | 897.34 mi (1,444.14 km) |
| Monte Porzio Catone to Mijas | 994.12 mi (1,599.89 km) |
| Monte Porzio Catone to Miranda de Ebro | 801.49 mi (1,289.87 km) |
