| Seacombe to Mangualde | 911.87 mi (1,467.52 km) |
| Seacombe to Marco de Canavezes | 877.56 mi (1,412.30 km) |
| Seacombe to Marinha Grande | 983.68 mi (1,583.07 km) |
| Seacombe to Massama | 1,054.69 mi (1,697.35 km) |
| Seacombe to Matosinhos | 884.82 mi (1,423.99 km) |
| Seacombe to Mealhada | 934.99 mi (1,504.72 km) |
| Seacombe to Melgaco | 816.71 mi (1,314.36 km) |
| Seacombe to Melres | 888.58 mi (1,430.02 km) |
| Seacombe to Mira | 935.32 mi (1,505.26 km) |
| Seacombe to Miranda do Corvo | 952.56 mi (1,533.00 km) |
| Seacombe to Mirandela | 846.02 mi (1,361.53 km) |
| Seacombe to Mogadouro | 851.71 mi (1,370.69 km) |
| Seacombe to Moimenta da Beira | 884.87 mi (1,424.07 km) |
| Seacombe to Moita | 1,058.07 mi (1,702.80 km) |
| Seacombe to Moncao | 822.55 mi (1,323.76 km) |
