| Irondale to Mangualde | 4,229.82 mi (6,807.24 km) |
| Irondale to Marco de Canavezes | 4,196.61 mi (6,753.80 km) |
| Irondale to Marinha Grande | 4,193.20 mi (6,748.31 km) |
| Irondale to Massama | 4,200.88 mi (6,760.66 km) |
| Irondale to Matosinhos | 4,169.81 mi (6,710.67 km) |
| Irondale to Mealhada | 4,201.48 mi (6,761.62 km) |
| Irondale to Melgaco | 4,168.59 mi (6,708.70 km) |
| Irondale to Melres | 4,187.26 mi (6,738.74 km) |
| Irondale to Mira | 4,186.32 mi (6,737.22 km) |
| Irondale to Miranda do Corvo | 4,214.22 mi (6,782.14 km) |
| Irondale to Mirandela | 4,236.20 mi (6,817.51 km) |
| Irondale to Mogadouro | 4,262.46 mi (6,859.77 km) |
| Irondale to Moimenta da Beira | 4,227.72 mi (6,803.86 km) |
| Irondale to Moita | 4,218.20 mi (6,788.54 km) |
| Irondale to Moncao | 4,159.34 mi (6,693.81 km) |
