| Olhao to Mangualde | 247.27 mi (397.94 km) |
| Olhao to Marco de Canavezes | 287.72 mi (463.04 km) |
| Olhao to Marinha Grande | 197.28 mi (317.50 km) |
| Olhao to Massama | 142.87 mi (229.93 km) |
| Olhao to Matosinhos | 290.91 mi (468.17 km) |
| Olhao to Mealhada | 234.28 mi (377.03 km) |
| Olhao to Melgaco | 352.46 mi (567.23 km) |
| Olhao to Melres | 280.79 mi (451.89 km) |
| Olhao to Mira | 240.28 mi (386.69 km) |
| Olhao to Miranda do Corvo | 214.05 mi (344.48 km) |
| Olhao to Mirandela | 310.12 mi (499.09 km) |
| Olhao to Mogadouro | 303.63 mi (488.64 km) |
| Olhao to Moimenta da Beira | 273.45 mi (440.07 km) |
| Olhao to Moita | 128.35 mi (206.57 km) |
| Olhao to Moncao | 350.39 mi (563.90 km) |
