| Castel Gandolfo to Mombris | 598.59 mi (963.33 km) |
| Castel Gandolfo to Monchengladbach | 716.42 mi (1,152.96 km) |
| Castel Gandolfo to Monschau | 680.92 mi (1,095.84 km) |
| Castel Gandolfo to Montabaur | 643.10 mi (1,034.97 km) |
| Castel Gandolfo to Moosburg | 465.61 mi (749.32 km) |
| Castel Gandolfo to Morbach | 617.66 mi (994.02 km) |
| Castel Gandolfo to Morfelden-Walldorf | 602.65 mi (969.87 km) |
| Castel Gandolfo to Morlenbach | 574.30 mi (924.25 km) |
| Castel Gandolfo to Morsbach | 672.32 mi (1,081.99 km) |
| Castel Gandolfo to Mosbach | 552.01 mi (888.37 km) |
| Castel Gandolfo to Mosigkau | 697.18 mi (1,122.00 km) |
| Castel Gandolfo to Mossingen | 492.27 mi (792.23 km) |
| Castel Gandolfo to Much | 680.88 mi (1,095.76 km) |
| Castel Gandolfo to Mucheln | 661.28 mi (1,064.23 km) |
| Castel Gandolfo to Muhlacker | 530.82 mi (854.28 km) |
