| Siegburg to Montemor-o-Novo | 1,125.95 mi (1,812.04 km) |
| Siegburg to Montemor-o-Velho | 1,059.87 mi (1,705.69 km) |
| Siegburg to Montijo | 1,146.48 mi (1,845.08 km) |
| Siegburg to Mortagua | 1,030.43 mi (1,658.31 km) |
| Siegburg to Moura | 1,130.73 mi (1,819.73 km) |
| Siegburg to Murtosa | 1,028.80 mi (1,655.70 km) |
| Siegburg to Nazare | 1,102.85 mi (1,774.86 km) |
| Siegburg to Nelas | 1,012.93 mi (1,630.16 km) |
| Siegburg to Obidos | 1,118.79 mi (1,800.52 km) |
| Siegburg to Odemira | 1,198.86 mi (1,929.38 km) |
| Siegburg to Odivelas | 1,149.98 mi (1,850.72 km) |
| Siegburg to Oeiras | 1,160.37 mi (1,867.43 km) |
| Siegburg to Olhao | 1,206.19 mi (1,941.18 km) |
| Siegburg to Oliveira de Azemeis | 1,017.78 mi (1,637.96 km) |
| Siegburg to Oliveira de Frades | 1,013.95 mi (1,631.80 km) |
