| Royal Leamington Spa to Mangualde | 859.40 mi (1,383.07 km) |
| Royal Leamington Spa to Marco de Canavezes | 828.11 mi (1,332.71 km) |
| Royal Leamington Spa to Marinha Grande | 935.23 mi (1,505.10 km) |
| Royal Leamington Spa to Massama | 1,006.02 mi (1,619.04 km) |
| Royal Leamington Spa to Matosinhos | 838.15 mi (1,348.87 km) |
| Royal Leamington Spa to Mealhada | 885.44 mi (1,424.98 km) |
| Royal Leamington Spa to Melgaco | 769.95 mi (1,239.11 km) |
| Royal Leamington Spa to Melres | 840.14 mi (1,352.07 km) |
| Royal Leamington Spa to Mira | 887.24 mi (1,427.87 km) |
| Royal Leamington Spa to Miranda do Corvo | 901.94 mi (1,451.53 km) |
| Royal Leamington Spa to Mirandela | 792.21 mi (1,274.94 km) |
| Royal Leamington Spa to Mogadouro | 795.28 mi (1,279.88 km) |
| Royal Leamington Spa to Moimenta da Beira | 832.34 mi (1,339.52 km) |
| Royal Leamington Spa to Moita | 1,007.96 mi (1,622.16 km) |
| Royal Leamington Spa to Moncao | 776.83 mi (1,250.19 km) |
