| Harrow to Mombris | 427.88 mi (688.61 km) |
| Harrow to Monchengladbach | 293.39 mi (472.17 km) |
| Harrow to Monschau | 295.14 mi (474.98 km) |
| Harrow to Montabaur | 363.77 mi (585.43 km) |
| Harrow to Moosburg | 585.19 mi (941.76 km) |
| Harrow to Morbach | 348.48 mi (560.82 km) |
| Harrow to Morfelden-Walldorf | 404.78 mi (651.43 km) |
| Harrow to Morlenbach | 421.03 mi (677.57 km) |
| Harrow to Morsbach | 352.21 mi (566.82 km) |
| Harrow to Mosbach | 444.65 mi (715.60 km) |
| Harrow to Mosigkau | 538.20 mi (866.15 km) |
| Harrow to Mossingen | 471.37 mi (758.60 km) |
| Harrow to Much | 338.00 mi (543.96 km) |
| Harrow to Mucheln | 522.87 mi (841.47 km) |
| Harrow to Muhlacker | 444.22 mi (714.91 km) |
