| Ianca to Mangualde | 1,796.85 mi (2,891.75 km) |
| Ianca to Marco de Canavezes | 1,801.23 mi (2,898.80 km) |
| Ianca to Marinha Grande | 1,876.69 mi (3,020.24 km) |
| Ianca to Massama | 1,921.64 mi (3,092.58 km) |
| Ianca to Matosinhos | 1,827.97 mi (2,941.83 km) |
| Ianca to Mealhada | 1,836.13 mi (2,954.96 km) |
| Ianca to Melgaco | 1,784.97 mi (2,872.63 km) |
| Ianca to Melres | 1,816.26 mi (2,922.99 km) |
| Ianca to Mira | 1,848.61 mi (2,975.05 km) |
| Ianca to Miranda do Corvo | 1,837.95 mi (2,957.90 km) |
| Ianca to Mirandela | 1,746.87 mi (2,811.32 km) |
| Ianca to Mogadouro | 1,727.89 mi (2,780.76 km) |
| Ianca to Moimenta da Beira | 1,780.17 mi (2,864.90 km) |
| Ianca to Moita | 1,910.59 mi (3,074.80 km) |
| Ianca to Moncao | 1,796.28 mi (2,890.84 km) |
