| Nieuwkoop to Montemor-o-Novo | 1,123.58 mi (1,808.22 km) |
| Nieuwkoop to Montemor-o-Velho | 1,046.89 mi (1,684.80 km) |
| Nieuwkoop to Montijo | 1,140.06 mi (1,834.74 km) |
| Nieuwkoop to Mortagua | 1,018.53 mi (1,639.17 km) |
| Nieuwkoop to Moura | 1,135.25 mi (1,827.01 km) |
| Nieuwkoop to Murtosa | 1,012.83 mi (1,629.99 km) |
| Nieuwkoop to Nazare | 1,090.81 mi (1,755.49 km) |
| Nieuwkoop to Nelas | 1,002.83 mi (1,613.90 km) |
| Nieuwkoop to Obidos | 1,107.52 mi (1,782.38 km) |
| Nieuwkoop to Odemira | 1,199.03 mi (1,929.65 km) |
| Nieuwkoop to Odivelas | 1,141.48 mi (1,837.04 km) |
| Nieuwkoop to Oeiras | 1,151.63 mi (1,853.38 km) |
| Nieuwkoop to Olhao | 1,213.19 mi (1,952.44 km) |
| Nieuwkoop to Oliveira de Azemeis | 1,002.08 mi (1,612.69 km) |
| Nieuwkoop to Oliveira de Frades | 1,000.69 mi (1,610.46 km) |
