| Crystal Lake to Mangualde | 4,009.28 mi (6,452.31 km) |
| Crystal Lake to Marco de Canavezes | 3,971.54 mi (6,391.58 km) |
| Crystal Lake to Marinha Grande | 3,986.00 mi (6,414.85 km) |
| Crystal Lake to Massama | 4,005.40 mi (6,446.07 km) |
| Crystal Lake to Matosinhos | 3,946.77 mi (6,351.71 km) |
| Crystal Lake to Mealhada | 3,985.83 mi (6,414.57 km) |
| Crystal Lake to Melgaco | 3,934.26 mi (6,331.57 km) |
| Crystal Lake to Melres | 3,964.32 mi (6,379.95 km) |
| Crystal Lake to Mira | 3,971.22 mi (6,391.06 km) |
| Crystal Lake to Miranda do Corvo | 4,001.07 mi (6,439.09 km) |
| Crystal Lake to Mirandela | 4,004.45 mi (6,444.54 km) |
| Crystal Lake to Mogadouro | 4,030.55 mi (6,486.54 km) |
| Crystal Lake to Moimenta da Beira | 4,002.76 mi (6,441.82 km) |
| Crystal Lake to Moita | 4,022.67 mi (6,473.86 km) |
| Crystal Lake to Moncao | 3,926.21 mi (6,318.63 km) |
