| Gretna to Mombris | 5,040.29 mi (8,111.57 km) |
| Gretna to Monchengladbach | 4,898.51 mi (7,883.39 km) |
| Gretna to Monschau | 4,909.70 mi (7,901.40 km) |
| Gretna to Montabaur | 4,975.82 mi (8,007.81 km) |
| Gretna to Moosburg | 5,202.06 mi (8,371.90 km) |
| Gretna to Morbach | 4,965.78 mi (7,991.65 km) |
| Gretna to Morfelden-Walldorf | 5,019.13 mi (8,077.50 km) |
| Gretna to Morlenbach | 5,037.52 mi (8,107.10 km) |
| Gretna to Morsbach | 4,958.79 mi (7,980.40 km) |
| Gretna to Mosbach | 5,061.59 mi (8,145.84 km) |
| Gretna to Mosigkau | 5,102.89 mi (8,212.30 km) |
| Gretna to Mossingen | 5,087.41 mi (8,187.40 km) |
| Gretna to Much | 4,944.83 mi (7,957.93 km) |
| Gretna to Mucheln | 5,103.80 mi (8,213.77 km) |
| Gretna to Muhlacker | 5,061.63 mi (8,145.91 km) |
