| Felixstowe to Mangualde | 895.82 mi (1,441.68 km) |
| Felixstowe to Marco de Canavezes | 869.26 mi (1,398.95 km) |
| Felixstowe to Marinha Grande | 976.15 mi (1,570.96 km) |
| Felixstowe to Massama | 1,045.77 mi (1,683.00 km) |
| Felixstowe to Matosinhos | 882.90 mi (1,420.89 km) |
| Felixstowe to Mealhada | 925.57 mi (1,489.56 km) |
| Felixstowe to Melgaco | 815.78 mi (1,312.87 km) |
| Felixstowe to Melres | 882.49 mi (1,420.23 km) |
| Felixstowe to Mira | 929.33 mi (1,495.61 km) |
| Felixstowe to Miranda do Corvo | 940.33 mi (1,513.32 km) |
| Felixstowe to Mirandela | 827.87 mi (1,332.33 km) |
| Felixstowe to Mogadouro | 827.03 mi (1,330.97 km) |
| Felixstowe to Moimenta da Beira | 869.12 mi (1,398.71 km) |
| Felixstowe to Moita | 1,045.68 mi (1,682.87 km) |
| Felixstowe to Moncao | 823.90 mi (1,325.94 km) |
