| Gretna to Miranda de Ebro | 4,717.62 mi (7,592.28 km) |
| Gretna to Mislata | 4,923.65 mi (7,923.86 km) |
| Gretna to Moana | 4,447.93 mi (7,158.24 km) |
| Gretna to Moguer | 4,660.25 mi (7,499.95 km) |
| Gretna to Molina de Segura | 4,923.87 mi (7,924.21 km) |
| Gretna to Molins de Rey | 4,985.62 mi (8,023.57 km) |
| Gretna to Mollerusa | 4,926.61 mi (7,928.61 km) |
| Gretna to Mollet | 4,991.30 mi (8,032.73 km) |
| Gretna to Moncada | 4,991.64 mi (8,033.26 km) |
| Gretna to Moncada | 4,922.67 mi (7,922.27 km) |
| Gretna to Monforte de Lemos | 4,502.56 mi (7,246.17 km) |
| Gretna to Monforte del Cid | 4,938.78 mi (7,948.20 km) |
| Gretna to Mongat | 4,996.50 mi (8,041.09 km) |
| Gretna to Monovar | 4,931.83 mi (7,937.01 km) |
| Gretna to Monserrat | 4,917.76 mi (7,914.37 km) |
