| Castanet-Tolosan to Marco de Canavezes | 517.99 mi (833.62 km) |
| Castanet-Tolosan to Marinha Grande | 597.64 mi (961.81 km) |
| Castanet-Tolosan to Massama | 649.14 mi (1,044.69 km) |
| Castanet-Tolosan to Matosinhos | 544.69 mi (876.60 km) |
| Castanet-Tolosan to Mealhada | 554.66 mi (892.64 km) |
| Castanet-Tolosan to Melgaco | 503.94 mi (811.01 km) |
| Castanet-Tolosan to Melres | 533.05 mi (857.86 km) |
| Castanet-Tolosan to Mira | 566.57 mi (911.81 km) |
| Castanet-Tolosan to Miranda do Corvo | 558.14 mi (898.24 km) |
| Castanet-Tolosan to Mirandela | 463.61 mi (746.11 km) |
| Castanet-Tolosan to Mogadouro | 445.04 mi (716.23 km) |
| Castanet-Tolosan to Moimenta da Beira | 497.54 mi (800.72 km) |
| Castanet-Tolosan to Moita | 640.35 mi (1,030.54 km) |
| Castanet-Tolosan to Moncao | 515.28 mi (829.26 km) |
| Castanet-Tolosan to Montalegre | 485.93 mi (782.03 km) |
