| Potters Bar to Masanasa | 849.20 mi (1,366.65 km) |
| Potters Bar to Masquefa | 710.64 mi (1,143.67 km) |
| Potters Bar to Matadepera | 705.18 mi (1,134.88 km) |
| Potters Bar to Mazarron | 975.75 mi (1,570.31 km) |
| Potters Bar to Meco | 784.36 mi (1,262.31 km) |
| Potters Bar to Medina del Campo | 752.47 mi (1,210.99 km) |
| Potters Bar to Medina Sidonia | 1,089.33 mi (1,753.10 km) |
| Potters Bar to Mejorada del Campo | 795.60 mi (1,280.40 km) |
| Potters Bar to Meliana | 840.96 mi (1,353.39 km) |
| Potters Bar to Mengibar | 964.81 mi (1,552.71 km) |
| Potters Bar to Merida | 932.58 mi (1,500.84 km) |
| Potters Bar to Miajadas | 911.97 mi (1,467.68 km) |
| Potters Bar to Mieres | 638.98 mi (1,028.33 km) |
| Potters Bar to Miguelturra | 898.16 mi (1,445.45 km) |
| Potters Bar to Mijas | 1,065.73 mi (1,715.13 km) |
