| Islington to Mangualde | 839.19 mi (1,350.55 km) |
| Islington to Marco de Canavezes | 811.06 mi (1,305.27 km) |
| Islington to Marinha Grande | 918.22 mi (1,477.72 km) |
| Islington to Massama | 988.32 mi (1,590.55 km) |
| Islington to Matosinhos | 823.62 mi (1,325.48 km) |
| Islington to Mealhada | 867.80 mi (1,396.59 km) |
| Islington to Melgaco | 756.04 mi (1,216.72 km) |
| Islington to Melres | 823.94 mi (1,326.00 km) |
| Islington to Mira | 870.95 mi (1,401.65 km) |
| Islington to Miranda do Corvo | 883.15 mi (1,421.29 km) |
| Islington to Mirandela | 771.34 mi (1,241.35 km) |
| Islington to Mogadouro | 771.82 mi (1,242.12 km) |
| Islington to Moimenta da Beira | 812.31 mi (1,307.29 km) |
| Islington to Moita | 988.89 mi (1,591.47 km) |
| Islington to Moncao | 763.81 mi (1,229.24 km) |
