| Nettuno to Montemor-o-Novo | 1,118.55 mi (1,800.12 km) |
| Nettuno to Montemor-o-Velho | 1,117.15 mi (1,797.89 km) |
| Nettuno to Montijo | 1,153.23 mi (1,855.94 km) |
| Nettuno to Mortagua | 1,090.34 mi (1,754.73 km) |
| Nettuno to Moura | 1,089.75 mi (1,753.78 km) |
| Nettuno to Murtosa | 1,107.37 mi (1,782.13 km) |
| Nettuno to Nazare | 1,145.49 mi (1,843.49 km) |
| Nettuno to Nelas | 1,069.49 mi (1,721.17 km) |
| Nettuno to Obidos | 1,154.22 mi (1,857.53 km) |
| Nettuno to Odemira | 1,163.22 mi (1,872.02 km) |
| Nettuno to Odivelas | 1,165.62 mi (1,875.89 km) |
| Nettuno to Oeiras | 1,174.78 mi (1,890.63 km) |
| Nettuno to Olhao | 1,136.35 mi (1,828.77 km) |
| Nettuno to Oliveira de Azemeis | 1,097.99 mi (1,767.04 km) |
| Nettuno to Oliveira de Frades | 1,084.32 mi (1,745.05 km) |
