| Diamond Bar to Montalegre | 5,576.93 mi (8,975.20 km) |
| Diamond Bar to Montemor-o-Novo | 5,694.09 mi (9,163.75 km) |
| Diamond Bar to Montemor-o-Velho | 5,610.18 mi (9,028.72 km) |
| Diamond Bar to Montijo | 5,663.56 mi (9,114.61 km) |
| Diamond Bar to Mortagua | 5,617.69 mi (9,040.80 km) |
| Diamond Bar to Moura | 5,748.79 mi (9,251.79 km) |
| Diamond Bar to Murtosa | 5,588.41 mi (8,993.67 km) |
| Diamond Bar to Nazare | 5,617.89 mi (9,041.12 km) |
| Diamond Bar to Nelas | 5,630.05 mi (9,060.68 km) |
| Diamond Bar to Obidos | 5,624.19 mi (9,051.25 km) |
| Diamond Bar to Odemira | 5,721.55 mi (9,207.95 km) |
| Diamond Bar to Odivelas | 5,647.10 mi (9,088.13 km) |
| Diamond Bar to Oeiras | 5,645.73 mi (9,085.92 km) |
| Diamond Bar to Olhao | 5,779.58 mi (9,301.33 km) |
| Diamond Bar to Oliveira de Azemeis | 5,590.48 mi (8,997.00 km) |
