| Mainz to Marco de Canavezes | 996.28 mi (1,603.36 km) |
| Mainz to Marinha Grande | 1,095.08 mi (1,762.36 km) |
| Mainz to Massama | 1,157.63 mi (1,863.02 km) |
| Mainz to Matosinhos | 1,017.27 mi (1,637.15 km) |
| Mainz to Mealhada | 1,045.98 mi (1,683.35 km) |
| Mainz to Melgaco | 957.89 mi (1,541.57 km) |
| Mainz to Melres | 1,011.28 mi (1,627.50 km) |
| Mainz to Mira | 1,054.16 mi (1,696.50 km) |
| Mainz to Miranda do Corvo | 1,055.58 mi (1,698.80 km) |
| Mainz to Mirandela | 945.43 mi (1,521.52 km) |
| Mainz to Mogadouro | 935.47 mi (1,505.49 km) |
| Mainz to Moimenta da Beira | 985.85 mi (1,586.57 km) |
| Mainz to Moita | 1,152.61 mi (1,854.95 km) |
| Mainz to Moncao | 968.18 mi (1,558.14 km) |
| Mainz to Montalegre | 952.77 mi (1,533.33 km) |
