| Monte Porzio Catone to Montemor-o-Novo | 1,122.68 mi (1,806.78 km) |
| Monte Porzio Catone to Montemor-o-Velho | 1,118.94 mi (1,800.75 km) |
| Monte Porzio Catone to Montijo | 1,157.08 mi (1,862.14 km) |
| Monte Porzio Catone to Mortagua | 1,091.83 mi (1,757.13 km) |
| Monte Porzio Catone to Moura | 1,094.91 mi (1,762.09 km) |
| Monte Porzio Catone to Murtosa | 1,108.31 mi (1,783.65 km) |
| Monte Porzio Catone to Nazare | 1,148.00 mi (1,847.53 km) |
| Monte Porzio Catone to Nelas | 1,070.93 mi (1,723.50 km) |
| Monte Porzio Catone to Obidos | 1,157.05 mi (1,862.09 km) |
| Monte Porzio Catone to Odemira | 1,168.68 mi (1,880.80 km) |
| Monte Porzio Catone to Odivelas | 1,169.24 mi (1,881.71 km) |
| Monte Porzio Catone to Oeiras | 1,178.50 mi (1,896.61 km) |
| Monte Porzio Catone to Olhao | 1,142.88 mi (1,839.28 km) |
| Monte Porzio Catone to Oliveira de Azemeis | 1,098.80 mi (1,768.35 km) |
| Monte Porzio Catone to Oliveira de Frades | 1,085.39 mi (1,746.77 km) |
