| Sumner to Mangualde | 5,160.50 mi (8,305.02 km) |
| Sumner to Marco de Canavezes | 5,116.80 mi (8,234.69 km) |
| Sumner to Marinha Grande | 5,165.83 mi (8,313.60 km) |
| Sumner to Massama | 5,206.37 mi (8,378.85 km) |
| Sumner to Matosinhos | 5,098.30 mi (8,204.92 km) |
| Sumner to Mealhada | 5,148.92 mi (8,286.38 km) |
| Sumner to Melgaco | 5,063.70 mi (8,149.23 km) |
| Sumner to Melres | 5,114.55 mi (8,231.07 km) |
| Sumner to Mira | 5,136.65 mi (8,266.65 km) |
| Sumner to Miranda do Corvo | 5,167.86 mi (8,316.86 km) |
| Sumner to Mirandela | 5,133.05 mi (8,260.85 km) |
| Sumner to Mogadouro | 5,156.50 mi (8,298.59 km) |
| Sumner to Moimenta da Beira | 5,145.53 mi (8,280.93 km) |
| Sumner to Moita | 5,222.15 mi (8,404.25 km) |
| Sumner to Moncao | 5,058.88 mi (8,141.49 km) |
