| Ruislip to Mangualde | 834.45 mi (1,342.91 km) |
| Ruislip to Marco de Canavezes | 805.74 mi (1,296.71 km) |
| Ruislip to Marinha Grande | 912.95 mi (1,469.26 km) |
| Ruislip to Massama | 983.21 mi (1,582.33 km) |
| Ruislip to Matosinhos | 817.88 mi (1,316.24 km) |
| Ruislip to Mealhada | 862.62 mi (1,388.25 km) |
| Ruislip to Melgaco | 750.14 mi (1,207.24 km) |
| Ruislip to Melres | 818.48 mi (1,317.22 km) |
| Ruislip to Mira | 865.53 mi (1,392.94 km) |
| Ruislip to Miranda do Corvo | 878.18 mi (1,413.29 km) |
| Ruislip to Mirandela | 766.67 mi (1,233.83 km) |
| Ruislip to Mogadouro | 767.61 mi (1,235.35 km) |
| Ruislip to Moimenta da Beira | 807.52 mi (1,299.58 km) |
| Ruislip to Moita | 984.02 mi (1,583.64 km) |
| Ruislip to Moncao | 757.78 mi (1,219.52 km) |
