| Drogheda to Montemor-o-Novo | 1,044.61 mi (1,681.14 km) |
| Drogheda to Montemor-o-Velho | 942.40 mi (1,516.64 km) |
| Drogheda to Montijo | 1,045.54 mi (1,682.63 km) |
| Drogheda to Mortagua | 921.85 mi (1,483.57 km) |
| Drogheda to Moura | 1,077.85 mi (1,734.63 km) |
| Drogheda to Murtosa | 903.19 mi (1,453.54 km) |
| Drogheda to Nazare | 983.52 mi (1,582.83 km) |
| Drogheda to Nelas | 914.57 mi (1,471.87 km) |
| Drogheda to Obidos | 1,000.68 mi (1,610.44 km) |
| Drogheda to Odemira | 1,119.87 mi (1,802.26 km) |
| Drogheda to Odivelas | 1,039.79 mi (1,673.38 km) |
| Drogheda to Oeiras | 1,047.98 mi (1,686.57 km) |
| Drogheda to Olhao | 1,155.29 mi (1,859.27 km) |
| Drogheda to Oliveira de Azemeis | 895.02 mi (1,440.39 km) |
| Drogheda to Oliveira de Frades | 902.12 mi (1,451.82 km) |
