| Porterville to Mangualde | 5,580.36 mi (8,980.71 km) |
| Porterville to Marco de Canavezes | 5,539.04 mi (8,914.23 km) |
| Porterville to Marinha Grande | 5,570.85 mi (8,965.42 km) |
| Porterville to Massama | 5,600.59 mi (9,013.29 km) |
| Porterville to Matosinhos | 5,517.07 mi (8,878.87 km) |
| Porterville to Mealhada | 5,562.48 mi (8,951.95 km) |
| Porterville to Melgaco | 5,493.08 mi (8,840.26 km) |
| Porterville to Melres | 5,534.23 mi (8,906.48 km) |
| Porterville to Mira | 5,548.82 mi (8,929.96 km) |
| Porterville to Miranda do Corvo | 5,579.77 mi (8,979.77 km) |
| Porterville to Mirandela | 5,563.93 mi (8,954.28 km) |
| Porterville to Mogadouro | 5,589.06 mi (8,994.72 km) |
| Porterville to Moimenta da Beira | 5,569.47 mi (8,963.20 km) |
| Porterville to Moita | 5,617.40 mi (9,040.33 km) |
| Porterville to Moncao | 5,486.59 mi (8,829.81 km) |
