| Gretna to Montevarchi | 5,353.18 mi (8,615.12 km) |
| Gretna to Monticello Conte Otto | 5,283.56 mi (8,503.07 km) |
| Gretna to Montichiari | 5,239.12 mi (8,431.56 km) |
| Gretna to Montignoso | 5,275.61 mi (8,490.27 km) |
| Gretna to Montopoli in Val d'Arno | 5,312.74 mi (8,550.02 km) |
| Gretna to Monza | 5,185.90 mi (8,345.91 km) |
| Gretna to Morbegno | 5,180.71 mi (8,337.55 km) |
| Gretna to Mori | 5,249.88 mi (8,448.86 km) |
| Gretna to Morlupo | 5,442.03 mi (8,758.10 km) |
| Gretna to Morrovalle | 5,447.86 mi (8,767.49 km) |
| Gretna to Mortara | 5,174.07 mi (8,326.86 km) |
| Gretna to Mosciano Sant'Angelo | 5,481.01 mi (8,820.83 km) |
| Gretna to Motta di Livenza | 5,320.53 mi (8,562.57 km) |
| Gretna to Motta Sant'Anastasia | 5,720.83 mi (9,206.79 km) |
| Gretna to Mottola | 5,696.45 mi (9,167.55 km) |
