| Slidell to Mangualde | 4,505.79 mi (7,251.36 km) |
| Slidell to Marco de Canavezes | 4,473.34 mi (7,199.15 km) |
| Slidell to Marinha Grande | 4,467.16 mi (7,189.20 km) |
| Slidell to Massama | 4,472.87 mi (7,198.38 km) |
| Slidell to Matosinhos | 4,446.30 mi (7,155.63 km) |
| Slidell to Mealhada | 4,476.76 mi (7,204.64 km) |
| Slidell to Melgaco | 4,446.73 mi (7,156.32 km) |
| Slidell to Melres | 4,463.69 mi (7,183.61 km) |
| Slidell to Mira | 4,461.55 mi (7,180.17 km) |
| Slidell to Miranda do Corvo | 4,489.08 mi (7,224.47 km) |
| Slidell to Mirandela | 4,513.82 mi (7,264.29 km) |
| Slidell to Mogadouro | 4,540.05 mi (7,306.50 km) |
| Slidell to Moimenta da Beira | 4,504.36 mi (7,249.07 km) |
| Slidell to Moita | 4,490.15 mi (7,226.20 km) |
| Slidell to Moncao | 4,437.33 mi (7,141.19 km) |
