| Maryland Heights to Montalegre | 4,185.93 mi (6,736.60 km) |
| Maryland Heights to Montemor-o-Novo | 4,269.09 mi (6,870.43 km) |
| Maryland Heights to Montemor-o-Velho | 4,197.60 mi (6,755.38 km) |
| Maryland Heights to Montijo | 4,235.60 mi (6,816.54 km) |
| Maryland Heights to Mortagua | 4,209.99 mi (6,775.33 km) |
| Maryland Heights to Moura | 4,322.70 mi (6,956.72 km) |
| Maryland Heights to Murtosa | 4,181.78 mi (6,729.93 km) |
| Maryland Heights to Nazare | 4,197.88 mi (6,755.83 km) |
| Maryland Heights to Nelas | 4,225.11 mi (6,799.65 km) |
| Maryland Heights to Obidos | 4,201.40 mi (6,761.50 km) |
| Maryland Heights to Odemira | 4,284.80 mi (6,895.72 km) |
| Maryland Heights to Odivelas | 4,218.82 mi (6,789.54 km) |
| Maryland Heights to Oeiras | 4,215.81 mi (6,784.69 km) |
| Maryland Heights to Olhao | 4,341.62 mi (6,987.16 km) |
| Maryland Heights to Oliveira de Azemeis | 4,185.73 mi (6,736.28 km) |
