| Del Rio to Montalegre | 5,045.08 mi (8,119.27 km) |
| Del Rio to Montemor-o-Novo | 5,116.78 mi (8,234.66 km) |
| Del Rio to Montemor-o-Velho | 5,050.21 mi (8,127.52 km) |
| Del Rio to Montijo | 5,082.39 mi (8,179.31 km) |
| Del Rio to Mortagua | 5,064.12 mi (8,149.91 km) |
| Del Rio to Moura | 5,169.60 mi (8,319.67 km) |
| Del Rio to Murtosa | 5,036.43 mi (8,105.34 km) |
| Del Rio to Nazare | 5,047.91 mi (8,123.82 km) |
| Del Rio to Nelas | 5,080.00 mi (8,175.48 km) |
| Del Rio to Obidos | 5,050.40 mi (8,127.83 km) |
| Del Rio to Odemira | 5,127.61 mi (8,252.10 km) |
| Del Rio to Odivelas | 5,065.60 mi (8,152.30 km) |
| Del Rio to Oeiras | 5,061.96 mi (8,146.44 km) |
| Del Rio to Olhao | 5,183.48 mi (8,342.01 km) |
| Del Rio to Oliveira de Azemeis | 5,040.93 mi (8,112.59 km) |
