| Willebroek to Montemor-o-Novo | 1,053.16 mi (1,694.90 km) |
| Willebroek to Montemor-o-Velho | 979.33 mi (1,576.08 km) |
| Willebroek to Montijo | 1,070.76 mi (1,723.22 km) |
| Willebroek to Mortagua | 950.59 mi (1,529.83 km) |
| Willebroek to Moura | 1,063.14 mi (1,710.96 km) |
| Willebroek to Murtosa | 946.13 mi (1,522.65 km) |
| Willebroek to Nazare | 1,023.05 mi (1,646.44 km) |
| Willebroek to Nelas | 934.34 mi (1,503.67 km) |
| Willebroek to Obidos | 1,039.56 mi (1,673.02 km) |
| Willebroek to Odemira | 1,128.07 mi (1,815.46 km) |
| Willebroek to Odivelas | 1,072.78 mi (1,726.47 km) |
| Willebroek to Oeiras | 1,083.01 mi (1,742.94 km) |
| Willebroek to Olhao | 1,140.61 mi (1,835.63 km) |
| Willebroek to Oliveira de Azemeis | 935.27 mi (1,505.17 km) |
| Willebroek to Oliveira de Frades | 933.13 mi (1,501.72 km) |
