| Gelsenkirchen to Montemor-o-Novo | 1,156.53 mi (1,861.25 km) |
| Gelsenkirchen to Montemor-o-Velho | 1,087.36 mi (1,749.93 km) |
| Gelsenkirchen to Montijo | 1,175.97 mi (1,892.54 km) |
| Gelsenkirchen to Mortagua | 1,058.17 mi (1,702.96 km) |
| Gelsenkirchen to Moura | 1,163.16 mi (1,871.92 km) |
| Gelsenkirchen to Murtosa | 1,055.36 mi (1,698.44 km) |
| Gelsenkirchen to Nazare | 1,130.69 mi (1,819.66 km) |
| Gelsenkirchen to Nelas | 1,041.15 mi (1,675.58 km) |
| Gelsenkirchen to Obidos | 1,146.87 mi (1,845.72 km) |
| Gelsenkirchen to Odemira | 1,230.24 mi (1,979.87 km) |
| Gelsenkirchen to Odivelas | 1,178.90 mi (1,897.26 km) |
| Gelsenkirchen to Oeiras | 1,189.24 mi (1,913.89 km) |
| Gelsenkirchen to Olhao | 1,239.37 mi (1,994.58 km) |
| Gelsenkirchen to Oliveira de Azemeis | 1,044.40 mi (1,680.80 km) |
| Gelsenkirchen to Oliveira de Frades | 1,041.27 mi (1,675.76 km) |
