| Cayey to Mangualde | 3,766.85 mi (6,062.16 km) |
| Cayey to Marco de Canavezes | 3,751.23 mi (6,037.03 km) |
| Cayey to Marinha Grande | 3,698.85 mi (5,952.72 km) |
| Cayey to Massama | 3,673.31 mi (5,911.62 km) |
| Cayey to Matosinhos | 3,722.85 mi (5,991.35 km) |
| Cayey to Mealhada | 3,729.18 mi (6,001.54 km) |
| Cayey to Melgaco | 3,753.42 mi (6,040.55 km) |
| Cayey to Melres | 3,737.34 mi (6,014.67 km) |
| Cayey to Mira | 3,714.78 mi (5,978.36 km) |
| Cayey to Miranda do Corvo | 3,733.12 mi (6,007.87 km) |
| Cayey to Mirandela | 3,803.55 mi (6,121.22 km) |
| Cayey to Mogadouro | 3,826.37 mi (6,157.95 km) |
| Cayey to Moimenta da Beira | 3,777.36 mi (6,079.07 km) |
| Cayey to Moita | 3,688.20 mi (5,935.59 km) |
| Cayey to Moncao | 3,742.18 mi (6,022.46 km) |
