| Ironton to Mangualde | 3,865.44 mi (6,220.82 km) |
| Ironton to Marco de Canavezes | 3,830.61 mi (6,164.77 km) |
| Ironton to Marinha Grande | 3,833.29 mi (6,169.09 km) |
| Ironton to Massama | 3,845.16 mi (6,188.19 km) |
| Ironton to Matosinhos | 3,804.40 mi (6,122.59 km) |
| Ironton to Mealhada | 3,838.67 mi (6,177.74 km) |
| Ironton to Melgaco | 3,799.46 mi (6,114.64 km) |
| Ironton to Melres | 3,821.93 mi (6,150.81 km) |
| Ironton to Mira | 3,823.65 mi (6,153.57 km) |
| Ironton to Miranda do Corvo | 3,852.31 mi (6,199.70 km) |
| Ironton to Mirandela | 3,868.11 mi (6,225.13 km) |
| Ironton to Mogadouro | 3,894.40 mi (6,267.43 km) |
| Ironton to Moimenta da Beira | 3,861.85 mi (6,215.04 km) |
| Ironton to Moita | 3,862.52 mi (6,216.13 km) |
| Ironton to Moncao | 3,790.57 mi (6,100.33 km) |
