| Rottingdean to Mangualde | 796.23 mi (1,281.41 km) |
| Rottingdean to Marco de Canavezes | 769.31 mi (1,238.08 km) |
| Rottingdean to Marinha Grande | 876.25 mi (1,410.20 km) |
| Rottingdean to Massama | 945.99 mi (1,522.42 km) |
| Rottingdean to Matosinhos | 782.79 mi (1,259.79 km) |
| Rottingdean to Mealhada | 825.70 mi (1,328.84 km) |
| Rottingdean to Melgaco | 715.64 mi (1,151.71 km) |
| Rottingdean to Melres | 782.47 mi (1,259.27 km) |
| Rottingdean to Mira | 829.35 mi (1,334.70 km) |
| Rottingdean to Miranda do Corvo | 840.60 mi (1,352.82 km) |
| Rottingdean to Mirandela | 728.29 mi (1,172.07 km) |
| Rottingdean to Mogadouro | 727.87 mi (1,171.39 km) |
| Rottingdean to Moimenta da Beira | 769.47 mi (1,238.35 km) |
| Rottingdean to Moita | 946.07 mi (1,522.56 km) |
| Rottingdean to Moncao | 723.75 mi (1,164.77 km) |
