| Ardea to Montemor-o-Novo | 1,113.14 mi (1,791.43 km) |
| Ardea to Montemor-o-Velho | 1,110.73 mi (1,787.54 km) |
| Ardea to Montijo | 1,147.70 mi (1,847.04 km) |
| Ardea to Mortagua | 1,083.79 mi (1,744.19 km) |
| Ardea to Moura | 1,084.81 mi (1,745.83 km) |
| Ardea to Murtosa | 1,100.59 mi (1,771.23 km) |
| Ardea to Nazare | 1,139.38 mi (1,833.65 km) |
| Ardea to Nelas | 1,062.92 mi (1,710.60 km) |
| Ardea to Obidos | 1,148.24 mi (1,847.91 km) |
| Ardea to Odemira | 1,158.42 mi (1,864.30 km) |
| Ardea to Odivelas | 1,159.99 mi (1,866.82 km) |
| Ardea to Oeiras | 1,169.19 mi (1,881.64 km) |
| Ardea to Olhao | 1,132.05 mi (1,821.86 km) |
| Ardea to Oliveira de Azemeis | 1,091.16 mi (1,756.05 km) |
| Ardea to Oliveira de Frades | 1,077.60 mi (1,734.23 km) |
