| Oria to Marco de Canavezes | 1,343.59 mi (2,162.31 km) |
| Oria to Marinha Grande | 1,399.20 mi (2,251.80 km) |
| Oria to Massama | 1,431.42 mi (2,303.64 km) |
| Oria to Matosinhos | 1,372.00 mi (2,208.02 km) |
| Oria to Mealhada | 1,366.57 mi (2,199.27 km) |
| Oria to Melgaco | 1,343.69 mi (2,162.46 km) |
| Oria to Melres | 1,357.46 mi (2,184.63 km) |
| Oria to Mira | 1,380.76 mi (2,222.12 km) |
| Oria to Miranda do Corvo | 1,363.64 mi (2,194.56 km) |
| Oria to Mirandela | 1,291.48 mi (2,078.44 km) |
| Oria to Mogadouro | 1,268.47 mi (2,041.41 km) |
| Oria to Moimenta da Beira | 1,317.50 mi (2,120.30 km) |
| Oria to Moita | 1,417.86 mi (2,281.82 km) |
| Oria to Moncao | 1,354.81 mi (2,180.36 km) |
| Oria to Montalegre | 1,320.86 mi (2,125.72 km) |
