| Portsmouth to Mombris | 453.76 mi (730.26 km) |
| Portsmouth to Monchengladbach | 327.97 mi (527.82 km) |
| Portsmouth to Monschau | 321.81 mi (517.90 km) |
| Portsmouth to Montabaur | 391.29 mi (629.73 km) |
| Portsmouth to Moosburg | 603.73 mi (971.61 km) |
| Portsmouth to Morbach | 368.18 mi (592.53 km) |
| Portsmouth to Morfelden-Walldorf | 429.19 mi (690.71 km) |
| Portsmouth to Morlenbach | 442.05 mi (711.41 km) |
| Portsmouth to Morsbach | 383.95 mi (617.92 km) |
| Portsmouth to Mosbach | 464.34 mi (747.28 km) |
| Portsmouth to Mosigkau | 578.74 mi (931.39 km) |
| Portsmouth to Mossingen | 483.05 mi (777.40 km) |
| Portsmouth to Much | 370.02 mi (595.48 km) |
| Portsmouth to Mucheln | 560.04 mi (901.29 km) |
| Portsmouth to Muhlacker | 459.80 mi (739.97 km) |
