| Workington to Mangualde | 988.68 mi (1,591.12 km) |
| Workington to Marco de Canavezes | 953.06 mi (1,533.80 km) |
| Workington to Marinha Grande | 1,058.32 mi (1,703.21 km) |
| Workington to Massama | 1,129.24 mi (1,817.33 km) |
| Workington to Matosinhos | 958.93 mi (1,543.25 km) |
| Workington to Mealhada | 1,010.33 mi (1,625.97 km) |
| Workington to Melgaco | 891.14 mi (1,434.16 km) |
| Workington to Melres | 963.54 mi (1,550.66 km) |
| Workington to Mira | 1,009.95 mi (1,625.35 km) |
| Workington to Miranda do Corvo | 1,028.36 mi (1,654.99 km) |
| Workington to Mirandela | 923.65 mi (1,486.47 km) |
| Workington to Mogadouro | 930.47 mi (1,497.45 km) |
| Workington to Moimenta da Beira | 961.79 mi (1,547.86 km) |
| Workington to Moita | 1,133.33 mi (1,823.92 km) |
| Workington to Moncao | 896.44 mi (1,442.69 km) |
