| Castalla to Mangualde | 402.00 mi (646.95 km) |
| Castalla to Marco de Canavezes | 434.72 mi (699.61 km) |
| Castalla to Marinha Grande | 449.51 mi (723.42 km) |
| Castalla to Massama | 464.06 mi (746.83 km) |
| Castalla to Matosinhos | 461.42 mi (742.58 km) |
| Castalla to Mealhada | 432.61 mi (696.21 km) |
| Castalla to Melgaco | 467.80 mi (752.85 km) |
| Castalla to Melres | 443.99 mi (714.53 km) |
| Castalla to Mira | 447.90 mi (720.83 km) |
| Castalla to Miranda do Corvo | 422.23 mi (679.51 km) |
| Castalla to Mirandela | 397.89 mi (640.34 km) |
| Castalla to Mogadouro | 371.69 mi (598.19 km) |
| Castalla to Moimenta da Beira | 403.55 mi (649.45 km) |
| Castalla to Moita | 448.57 mi (721.91 km) |
| Castalla to Moncao | 476.01 mi (766.07 km) |
