| Heiloo to Montemor-o-Novo | 1,144.87 mi (1,842.48 km) |
| Heiloo to Montemor-o-Velho | 1,066.77 mi (1,716.81 km) |
| Heiloo to Montijo | 1,160.76 mi (1,868.07 km) |
| Heiloo to Mortagua | 1,038.63 mi (1,671.51 km) |
| Heiloo to Moura | 1,157.44 mi (1,862.72 km) |
| Heiloo to Murtosa | 1,032.32 mi (1,661.36 km) |
| Heiloo to Nazare | 1,110.77 mi (1,787.61 km) |
| Heiloo to Nelas | 1,023.21 mi (1,646.70 km) |
| Heiloo to Obidos | 1,127.57 mi (1,814.65 km) |
| Heiloo to Odemira | 1,220.57 mi (1,964.33 km) |
| Heiloo to Odivelas | 1,161.89 mi (1,869.88 km) |
| Heiloo to Oeiras | 1,171.99 mi (1,886.14 km) |
| Heiloo to Olhao | 1,235.61 mi (1,988.52 km) |
| Heiloo to Oliveira de Azemeis | 1,021.63 mi (1,644.16 km) |
| Heiloo to Oliveira de Frades | 1,020.61 mi (1,642.52 km) |
