| Amposta to Mangualde | 437.14 mi (703.51 km) |
| Amposta to Marco de Canavezes | 456.61 mi (734.85 km) |
| Amposta to Marinha Grande | 505.98 mi (814.29 km) |
| Amposta to Massama | 540.46 mi (869.79 km) |
| Amposta to Matosinhos | 485.21 mi (780.87 km) |
| Amposta to Mealhada | 474.47 mi (763.58 km) |
| Amposta to Melgaco | 468.40 mi (753.81 km) |
| Amposta to Melres | 469.53 mi (755.64 km) |
| Amposta to Mira | 488.97 mi (786.93 km) |
| Amposta to Miranda do Corvo | 470.69 mi (757.50 km) |
| Amposta to Mirandela | 407.56 mi (655.91 km) |
| Amposta to Mogadouro | 382.71 mi (615.92 km) |
| Amposta to Moimenta da Beira | 428.55 mi (689.68 km) |
| Amposta to Moita | 527.82 mi (849.44 km) |
| Amposta to Moncao | 478.76 mi (770.48 km) |
