| Gretna to Melzo | 5,194.72 mi (8,360.10 km) |
| Gretna to Mendicino | 5,710.99 mi (9,190.95 km) |
| Gretna to Menfi | 5,623.98 mi (9,050.91 km) |
| Gretna to Mentana | 5,452.89 mi (8,775.58 km) |
| Gretna to Merano | 5,230.06 mi (8,416.97 km) |
| Gretna to Merate | 5,188.99 mi (8,350.87 km) |
| Gretna to Mercato San Severino | 5,590.87 mi (8,997.64 km) |
| Gretna to Mercogliano | 5,584.71 mi (8,987.72 km) |
| Gretna to Mesagne | 5,732.52 mi (9,225.60 km) |
| Gretna to Messina | 5,722.04 mi (9,208.74 km) |
| Gretna to Mestre | 5,314.88 mi (8,553.47 km) |
| Gretna to Mestrino | 5,296.37 mi (8,523.68 km) |
| Gretna to Milan | 5,186.07 mi (8,346.17 km) |
| Gretna to Milazzo | 5,706.66 mi (9,183.99 km) |
| Gretna to Minerbio | 5,311.96 mi (8,548.77 km) |
