| Grain Valley to Mangualde | 4,387.04 mi (7,060.26 km) |
| Grain Valley to Marco de Canavezes | 4,349.56 mi (6,999.95 km) |
| Grain Valley to Marinha Grande | 4,362.76 mi (7,021.18 km) |
| Grain Valley to Massama | 4,381.15 mi (7,050.78 km) |
| Grain Valley to Matosinhos | 4,324.64 mi (6,959.84 km) |
| Grain Valley to Mealhada | 4,363.23 mi (7,021.94 km) |
| Grain Valley to Melgaco | 4,312.78 mi (6,940.74 km) |
| Grain Valley to Melres | 4,342.20 mi (6,988.09 km) |
| Grain Valley to Mira | 4,348.57 mi (6,998.35 km) |
| Grain Valley to Miranda do Corvo | 4,378.30 mi (7,046.20 km) |
| Grain Valley to Mirandela | 4,382.89 mi (7,053.57 km) |
| Grain Valley to Mogadouro | 4,409.01 mi (7,095.61 km) |
| Grain Valley to Moimenta da Beira | 4,380.80 mi (7,050.22 km) |
| Grain Valley to Moita | 4,398.45 mi (7,078.62 km) |
| Grain Valley to Moncao | 4,304.66 mi (6,927.69 km) |
