| Gretna to Mechernich | 4,924.27 mi (7,924.85 km) |
| Gretna to Meckenbeuren | 5,130.42 mi (8,256.62 km) |
| Gretna to Meckenheim | 4,937.91 mi (7,946.79 km) |
| Gretna to Meerane | 5,143.83 mi (8,278.20 km) |
| Gretna to Meerbusch | 4,905.81 mi (7,895.13 km) |
| Gretna to Meine | 5,021.35 mi (8,081.09 km) |
| Gretna to Meinerzhagen | 4,948.15 mi (7,963.28 km) |
| Gretna to Meiningen | 5,074.42 mi (8,166.48 km) |
| Gretna to Meissen | 5,172.15 mi (8,323.78 km) |
| Gretna to Meitingen | 5,155.56 mi (8,297.08 km) |
| Gretna to Melle | 4,943.48 mi (7,955.76 km) |
| Gretna to Melsungen | 5,022.48 mi (8,082.90 km) |
| Gretna to Memmelsdorf | 5,115.13 mi (8,232.01 km) |
| Gretna to Memmingen | 5,146.66 mi (8,282.75 km) |
| Gretna to Mendig | 4,955.99 mi (7,975.89 km) |
