| Portsmouth to Montijo | 864.78 mi (1,391.72 km) |
| Portsmouth to Montilla | 930.04 mi (1,496.75 km) |
| Portsmouth to Montmelo | 658.64 mi (1,059.98 km) |
| Portsmouth to Montornes del Valles | 659.53 mi (1,061.42 km) |
| Portsmouth to Montoro | 898.25 mi (1,445.60 km) |
| Portsmouth to Monzon | 617.62 mi (993.97 km) |
| Portsmouth to Mora | 779.36 mi (1,254.26 km) |
| Portsmouth to Moralzarzal | 713.49 mi (1,148.25 km) |
| Portsmouth to Moron de la Frontera | 969.60 mi (1,560.41 km) |
| Portsmouth to Mostoles | 735.82 mi (1,184.19 km) |
| Portsmouth to Motril | 978.55 mi (1,574.83 km) |
| Portsmouth to Muchamiel | 856.79 mi (1,378.87 km) |
| Portsmouth to Mula | 882.12 mi (1,419.64 km) |
| Portsmouth to Munguia | 521.40 mi (839.11 km) |
| Portsmouth to Murcia | 885.76 mi (1,425.49 km) |
