| Barstow to Mangualde | 5,556.95 mi (8,943.05 km) |
| Barstow to Marco de Canavezes | 5,516.28 mi (8,877.59 km) |
| Barstow to Marinha Grande | 5,544.48 mi (8,922.97 km) |
| Barstow to Massama | 5,571.95 mi (8,967.18 km) |
| Barstow to Matosinhos | 5,493.68 mi (8,841.22 km) |
| Barstow to Mealhada | 5,537.86 mi (8,912.33 km) |
| Barstow to Melgaco | 5,471.96 mi (8,806.27 km) |
| Barstow to Melres | 5,510.96 mi (8,869.03 km) |
| Barstow to Mira | 5,523.97 mi (8,889.96 km) |
| Barstow to Miranda do Corvo | 5,554.75 mi (8,939.50 km) |
| Barstow to Mirandela | 5,542.85 mi (8,920.36 km) |
| Barstow to Mogadouro | 5,568.24 mi (8,961.21 km) |
| Barstow to Moimenta da Beira | 5,546.94 mi (8,926.94 km) |
| Barstow to Moita | 5,588.90 mi (8,994.46 km) |
| Barstow to Moncao | 5,465.14 mi (8,795.29 km) |
