| Castricum to Montemor-o-Novo | 1,140.85 mi (1,836.02 km) |
| Castricum to Montemor-o-Velho | 1,062.80 mi (1,710.41 km) |
| Castricum to Montijo | 1,156.76 mi (1,861.63 km) |
| Castricum to Mortagua | 1,034.64 mi (1,665.10 km) |
| Castricum to Moura | 1,153.41 mi (1,856.23 km) |
| Castricum to Murtosa | 1,028.36 mi (1,654.99 km) |
| Castricum to Nazare | 1,106.79 mi (1,781.21 km) |
| Castricum to Nelas | 1,019.22 mi (1,640.28 km) |
| Castricum to Obidos | 1,123.59 mi (1,808.24 km) |
| Castricum to Odemira | 1,216.55 mi (1,957.85 km) |
| Castricum to Odivelas | 1,157.89 mi (1,863.45 km) |
| Castricum to Oeiras | 1,168.00 mi (1,879.72 km) |
| Castricum to Olhao | 1,231.57 mi (1,982.03 km) |
| Castricum to Oliveira de Azemeis | 1,017.67 mi (1,637.78 km) |
| Castricum to Oliveira de Frades | 1,016.64 mi (1,636.12 km) |
