| Westbrook to Mangualde | 3,136.07 mi (5,047.02 km) |
| Westbrook to Marco de Canavezes | 3,100.61 mi (4,989.95 km) |
| Westbrook to Marinha Grande | 3,106.07 mi (4,998.74 km) |
| Westbrook to Massama | 3,120.24 mi (5,021.54 km) |
| Westbrook to Matosinhos | 3,074.66 mi (4,948.19 km) |
| Westbrook to Mealhada | 3,110.03 mi (5,005.11 km) |
| Westbrook to Melgaco | 3,068.36 mi (4,938.04 km) |
| Westbrook to Melres | 3,092.22 mi (4,976.44 km) |
| Westbrook to Mira | 3,095.09 mi (4,981.07 km) |
| Westbrook to Miranda do Corvo | 3,124.08 mi (5,027.71 km) |
| Westbrook to Mirandela | 3,137.32 mi (5,049.02 km) |
| Westbrook to Mogadouro | 3,163.59 mi (5,091.31 km) |
| Westbrook to Moimenta da Beira | 3,131.87 mi (5,040.26 km) |
| Westbrook to Moita | 3,137.60 mi (5,049.47 km) |
| Westbrook to Moncao | 3,059.59 mi (4,923.94 km) |
