| Gretna to Mancha Real | 4,810.99 mi (7,742.54 km) |
| Gretna to Manilva | 4,764.70 mi (7,668.04 km) |
| Gretna to Manises | 4,921.74 mi (7,920.78 km) |
| Gretna to Manlleu | 4,981.41 mi (8,016.80 km) |
| Gretna to Manresa | 4,967.91 mi (7,995.08 km) |
| Gretna to Manzanares | 4,790.97 mi (7,710.31 km) |
| Gretna to Manzanares el Real | 4,722.31 mi (7,599.83 km) |
| Gretna to Maracena | 4,825.61 mi (7,766.07 km) |
| Gretna to Marbella | 4,780.02 mi (7,692.70 km) |
| Gretna to Marchena | 4,731.43 mi (7,614.50 km) |
| Gretna to Marin | 4,447.99 mi (7,158.34 km) |
| Gretna to Marratxi | 5,072.34 mi (8,163.14 km) |
| Gretna to Martorell | 4,979.86 mi (8,014.32 km) |
| Gretna to Martos | 4,794.97 mi (7,716.76 km) |
| Gretna to Masamagrell | 4,925.18 mi (7,926.31 km) |
