| Corpus Christi to Mangualde | 4,981.87 mi (8,017.55 km) |
| Corpus Christi to Marco de Canavezes | 4,948.39 mi (7,963.67 km) |
| Corpus Christi to Marinha Grande | 4,945.71 mi (7,959.36 km) |
| Corpus Christi to Massama | 4,953.51 mi (7,971.90 km) |
| Corpus Christi to Matosinhos | 4,921.69 mi (7,920.70 km) |
| Corpus Christi to Mealhada | 4,953.73 mi (7,972.26 km) |
| Corpus Christi to Melgaco | 4,919.70 mi (7,917.49 km) |
| Corpus Christi to Melres | 4,939.15 mi (7,948.80 km) |
| Corpus Christi to Mira | 4,938.58 mi (7,947.88 km) |
| Corpus Christi to Miranda do Corvo | 4,966.57 mi (7,992.93 km) |
| Corpus Christi to Mirandela | 4,987.57 mi (8,026.72 km) |
| Corpus Christi to Mogadouro | 5,013.84 mi (8,069.00 km) |
| Corpus Christi to Moimenta da Beira | 4,979.53 mi (8,013.78 km) |
| Corpus Christi to Moita | 4,970.84 mi (7,999.79 km) |
| Corpus Christi to Moncao | 4,910.53 mi (7,902.73 km) |
