| Croydon to Mangualde | 828.68 mi (1,333.64 km) |
| Croydon to Marco de Canavezes | 800.79 mi (1,288.75 km) |
| Croydon to Marinha Grande | 907.92 mi (1,461.15 km) |
| Croydon to Massama | 977.95 mi (1,573.86 km) |
| Croydon to Matosinhos | 813.54 mi (1,309.27 km) |
| Croydon to Mealhada | 857.47 mi (1,379.96 km) |
| Croydon to Melgaco | 746.04 mi (1,200.64 km) |
| Croydon to Melres | 813.73 mi (1,309.58 km) |
| Croydon to Mira | 860.72 mi (1,385.19 km) |
| Croydon to Miranda do Corvo | 872.73 mi (1,404.52 km) |
| Croydon to Mirandela | 760.81 mi (1,224.40 km) |
| Croydon to Mogadouro | 761.10 mi (1,224.88 km) |
| Croydon to Moimenta da Beira | 801.83 mi (1,290.42 km) |
| Croydon to Moita | 978.42 mi (1,574.62 km) |
| Croydon to Moncao | 753.89 mi (1,213.27 km) |
