| Grottaglie to Marco de Canavezes | 1,332.85 mi (2,145.01 km) |
| Grottaglie to Marinha Grande | 1,388.50 mi (2,234.58 km) |
| Grottaglie to Massama | 1,420.78 mi (2,286.52 km) |
| Grottaglie to Matosinhos | 1,361.25 mi (2,190.72 km) |
| Grottaglie to Mealhada | 1,355.84 mi (2,182.01 km) |
| Grottaglie to Melgaco | 1,332.94 mi (2,145.16 km) |
| Grottaglie to Melres | 1,346.72 mi (2,167.33 km) |
| Grottaglie to Mira | 1,370.03 mi (2,204.85 km) |
| Grottaglie to Miranda do Corvo | 1,352.92 mi (2,177.32 km) |
| Grottaglie to Mirandela | 1,280.73 mi (2,061.13 km) |
| Grottaglie to Mogadouro | 1,257.72 mi (2,024.11 km) |
| Grottaglie to Moimenta da Beira | 1,306.75 mi (2,103.02 km) |
| Grottaglie to Moita | 1,407.23 mi (2,264.72 km) |
| Grottaglie to Moncao | 1,344.06 mi (2,163.05 km) |
| Grottaglie to Montalegre | 1,310.11 mi (2,108.42 km) |
