| Southend to Montijo | 942.16 mi (1,516.27 km) |
| Southend to Montilla | 999.52 mi (1,608.58 km) |
| Southend to Montmelo | 694.43 mi (1,117.58 km) |
| Southend to Montornes del Valles | 695.22 mi (1,118.86 km) |
| Southend to Montoro | 967.24 mi (1,556.62 km) |
| Southend to Monzon | 666.51 mi (1,072.64 km) |
| Southend to Mora | 847.64 mi (1,364.14 km) |
| Southend to Moralzarzal | 783.69 mi (1,261.22 km) |
| Southend to Moron de la Frontera | 1,041.40 mi (1,675.97 km) |
| Southend to Mostoles | 805.18 mi (1,295.81 km) |
| Southend to Motril | 1,043.37 mi (1,679.15 km) |
| Southend to Muchamiel | 909.36 mi (1,463.48 km) |
| Southend to Mula | 939.42 mi (1,511.85 km) |
| Southend to Munguia | 589.94 mi (949.42 km) |
| Southend to Murcia | 941.43 mi (1,515.09 km) |
