| Duffel to Montemor-o-Novo | 1,059.14 mi (1,704.52 km) |
| Duffel to Montemor-o-Velho | 985.56 mi (1,586.11 km) |
| Duffel to Montijo | 1,076.84 mi (1,733.01 km) |
| Duffel to Mortagua | 956.80 mi (1,539.81 km) |
| Duffel to Moura | 1,068.93 mi (1,720.28 km) |
| Duffel to Murtosa | 952.42 mi (1,532.77 km) |
| Duffel to Nazare | 1,029.26 mi (1,656.44 km) |
| Duffel to Nelas | 940.49 mi (1,513.58 km) |
| Duffel to Obidos | 1,045.76 mi (1,682.98 km) |
| Duffel to Odemira | 1,133.99 mi (1,824.98 km) |
| Duffel to Odivelas | 1,078.91 mi (1,736.33 km) |
| Duffel to Oeiras | 1,089.15 mi (1,752.81 km) |
| Duffel to Olhao | 1,146.34 mi (1,844.85 km) |
| Duffel to Oliveira de Azemeis | 941.55 mi (1,515.29 km) |
| Duffel to Oliveira de Frades | 939.36 mi (1,511.75 km) |
