| Llanelli to Mangualde | 784.42 mi (1,262.41 km) |
| Llanelli to Marco de Canavezes | 749.66 mi (1,206.46 km) |
| Llanelli to Marinha Grande | 855.59 mi (1,376.95 km) |
| Llanelli to Massama | 926.60 mi (1,491.21 km) |
| Llanelli to Matosinhos | 756.63 mi (1,217.68 km) |
| Llanelli to Mealhada | 807.06 mi (1,298.84 km) |
| Llanelli to Melgaco | 688.55 mi (1,108.12 km) |
| Llanelli to Melres | 760.54 mi (1,223.98 km) |
| Llanelli to Mira | 807.23 mi (1,299.11 km) |
| Llanelli to Miranda do Corvo | 824.77 mi (1,327.33 km) |
| Llanelli to Mirandela | 718.93 mi (1,157.00 km) |
| Llanelli to Mogadouro | 725.28 mi (1,167.23 km) |
| Llanelli to Moimenta da Beira | 757.47 mi (1,219.03 km) |
| Llanelli to Moita | 930.15 mi (1,496.92 km) |
| Llanelli to Moncao | 694.31 mi (1,117.39 km) |
