| Portici to Montilla | 1,038.03 mi (1,670.55 km) |
| Portici to Montmelo | 630.23 mi (1,014.26 km) |
| Portici to Montornes del Valles | 629.34 mi (1,012.83 km) |
| Portici to Montoro | 1,015.97 mi (1,635.05 km) |
| Portici to Monzon | 736.82 mi (1,185.80 km) |
| Portici to Mora | 956.92 mi (1,540.02 km) |
| Portici to Moralzarzal | 956.76 mi (1,539.76 km) |
| Portici to Moron de la Frontera | 1,090.90 mi (1,755.64 km) |
| Portici to Mostoles | 954.40 mi (1,535.96 km) |
| Portici to Motril | 1,000.01 mi (1,609.36 km) |
| Portici to Muchamiel | 803.34 mi (1,292.85 km) |
| Portici to Mula | 865.11 mi (1,392.26 km) |
| Portici to Munguia | 896.88 mi (1,443.38 km) |
| Portici to Murcia | 847.64 mi (1,364.15 km) |
| Portici to Muro del Alcoy | 795.98 mi (1,281.01 km) |
