| Southend to Masanasa | 840.60 mi (1,352.82 km) |
| Southend to Masquefa | 696.10 mi (1,120.26 km) |
| Southend to Matadepera | 690.03 mi (1,110.49 km) |
| Southend to Mazarron | 969.00 mi (1,559.46 km) |
| Southend to Meco | 783.70 mi (1,261.25 km) |
| Southend to Medina del Campo | 756.64 mi (1,217.70 km) |
| Southend to Medina Sidonia | 1,091.83 mi (1,757.12 km) |
| Southend to Mejorada del Campo | 794.99 mi (1,279.41 km) |
| Southend to Meliana | 832.25 mi (1,339.38 km) |
| Southend to Mengibar | 963.76 mi (1,551.02 km) |
| Southend to Merida | 937.76 mi (1,509.18 km) |
| Southend to Miajadas | 916.80 mi (1,475.44 km) |
| Southend to Mieres | 648.12 mi (1,043.04 km) |
| Southend to Miguelturra | 898.00 mi (1,445.19 km) |
| Southend to Mijas | 1,065.73 mi (1,715.12 km) |
