| Oppeano to Marco de Canavezes | 1,010.98 mi (1,627.02 km) |
| Oppeano to Marinha Grande | 1,090.18 mi (1,754.48 km) |
| Oppeano to Massama | 1,139.05 mi (1,833.13 km) |
| Oppeano to Matosinhos | 1,037.37 mi (1,669.49 km) |
| Oppeano to Mealhada | 1,047.89 mi (1,686.42 km) |
| Oppeano to Melgaco | 993.38 mi (1,598.69 km) |
| Oppeano to Melres | 1,026.11 mi (1,651.36 km) |
| Oppeano to Mira | 1,059.90 mi (1,705.74 km) |
| Oppeano to Miranda do Corvo | 1,050.90 mi (1,691.27 km) |
| Oppeano to Mirandela | 956.59 mi (1,539.48 km) |
| Oppeano to Mogadouro | 938.37 mi (1,510.16 km) |
| Oppeano to Moimenta da Beira | 990.89 mi (1,594.68 km) |
| Oppeano to Moita | 1,129.19 mi (1,817.25 km) |
| Oppeano to Moncao | 1,004.69 mi (1,616.90 km) |
| Oppeano to Montalegre | 977.40 mi (1,572.97 km) |
