| San Luis Obispo to Mangualde | 5,684.37 mi (9,148.11 km) |
| San Luis Obispo to Marco de Canavezes | 5,642.94 mi (9,081.44 km) |
| San Luis Obispo to Marinha Grande | 5,675.39 mi (9,133.66 km) |
| San Luis Obispo to Massama | 5,705.50 mi (9,182.11 km) |
| San Luis Obispo to Matosinhos | 5,621.09 mi (9,046.27 km) |
| San Luis Obispo to Mealhada | 5,666.72 mi (9,119.70 km) |
| San Luis Obispo to Melgaco | 5,596.68 mi (9,006.98 km) |
| San Luis Obispo to Melres | 5,638.22 mi (9,073.84 km) |
| San Luis Obispo to Mira | 5,653.10 mi (9,097.78 km) |
| San Luis Obispo to Miranda do Corvo | 5,684.07 mi (9,147.63 km) |
| San Luis Obispo to Mirandela | 5,667.50 mi (9,120.96 km) |
| San Luis Obispo to Mogadouro | 5,692.57 mi (9,161.31 km) |
| San Luis Obispo to Moimenta da Beira | 5,673.32 mi (9,130.33 km) |
| San Luis Obispo to Moita | 5,722.28 mi (9,209.12 km) |
| San Luis Obispo to Moncao | 5,590.24 mi (8,996.63 km) |
