| Libourne to Marco de Canavezes | 475.22 mi (764.79 km) |
| Libourne to Marinha Grande | 569.30 mi (916.21 km) |
| Libourne to Massama | 629.86 mi (1,013.66 km) |
| Libourne to Matosinhos | 498.71 mi (802.60 km) |
| Libourne to Mealhada | 521.40 mi (839.11 km) |
| Libourne to Melgaco | 446.10 mi (717.93 km) |
| Libourne to Melres | 490.49 mi (789.36 km) |
| Libourne to Mira | 530.79 mi (854.23 km) |
| Libourne to Miranda do Corvo | 529.48 mi (852.11 km) |
| Libourne to Mirandela | 422.31 mi (679.64 km) |
| Libourne to Mogadouro | 409.76 mi (659.44 km) |
| Libourne to Moimenta da Beira | 461.40 mi (742.55 km) |
| Libourne to Moita | 624.27 mi (1,004.67 km) |
| Libourne to Moncao | 457.15 mi (735.71 km) |
| Libourne to Montalegre | 435.22 mi (700.42 km) |
