| Petal to Mangualde | 4,438.11 mi (7,142.45 km) |
| Petal to Marco de Canavezes | 4,405.30 mi (7,089.65 km) |
| Petal to Marinha Grande | 4,400.42 mi (7,081.79 km) |
| Petal to Massama | 4,407.02 mi (7,092.41 km) |
| Petal to Matosinhos | 4,378.37 mi (7,046.31 km) |
| Petal to Mealhada | 4,409.40 mi (7,096.25 km) |
| Petal to Melgaco | 4,378.00 mi (7,045.72 km) |
| Petal to Melres | 4,395.79 mi (7,074.34 km) |
| Petal to Mira | 4,394.21 mi (7,071.81 km) |
| Petal to Miranda do Corvo | 4,421.92 mi (7,116.40 km) |
| Petal to Mirandela | 4,445.35 mi (7,154.11 km) |
| Petal to Mogadouro | 4,471.60 mi (7,196.34 km) |
| Petal to Moimenta da Beira | 4,436.37 mi (7,139.64 km) |
| Petal to Moita | 4,424.32 mi (7,120.26 km) |
| Petal to Moncao | 4,368.67 mi (7,030.70 km) |
