| Rockwall to Mangualde | 4,724.82 mi (7,603.86 km) |
| Rockwall to Marco de Canavezes | 4,689.37 mi (7,546.80 km) |
| Rockwall to Marinha Grande | 4,694.14 mi (7,554.49 km) |
| Rockwall to Massama | 4,706.93 mi (7,575.07 km) |
| Rockwall to Matosinhos | 4,663.43 mi (7,505.06 km) |
| Rockwall to Mealhada | 4,698.63 mi (7,561.72 km) |
| Rockwall to Melgaco | 4,656.78 mi (7,494.37 km) |
| Rockwall to Melres | 4,680.98 mi (7,533.31 km) |
| Rockwall to Mira | 4,683.67 mi (7,537.64 km) |
| Rockwall to Miranda do Corvo | 4,712.56 mi (7,584.13 km) |
| Rockwall to Mirandela | 4,725.89 mi (7,605.58 km) |
| Rockwall to Mogadouro | 4,752.16 mi (7,647.85 km) |
| Rockwall to Moimenta da Beira | 4,720.63 mi (7,597.12 km) |
| Rockwall to Moita | 4,724.29 mi (7,603.01 km) |
| Rockwall to Moncao | 4,648.09 mi (7,480.38 km) |
