| Mattoon to Mangualde | 4,102.12 mi (6,601.72 km) |
| Mattoon to Marco de Canavezes | 4,065.62 mi (6,542.98 km) |
| Mattoon to Marinha Grande | 4,074.79 mi (6,557.74 km) |
| Mattoon to Massama | 4,090.74 mi (6,583.40 km) |
| Mattoon to Matosinhos | 4,040.17 mi (6,502.03 km) |
| Mattoon to Mealhada | 4,077.14 mi (6,561.52 km) |
| Mattoon to Melgaco | 4,030.98 mi (6,487.24 km) |
| Mattoon to Melres | 4,057.74 mi (6,530.30 km) |
| Mattoon to Mira | 4,062.32 mi (6,537.68 km) |
| Mattoon to Miranda do Corvo | 4,091.68 mi (6,584.92 km) |
| Mattoon to Mirandela | 4,100.61 mi (6,599.30 km) |
| Mattoon to Mogadouro | 4,126.83 mi (6,641.49 km) |
| Mattoon to Moimenta da Beira | 4,096.90 mi (6,593.32 km) |
| Mattoon to Moita | 4,108.08 mi (6,611.31 km) |
| Mattoon to Moncao | 4,022.56 mi (6,473.68 km) |
