| Groningen to Montemor-o-Novo | 1,226.67 mi (1,974.14 km) |
| Groningen to Montemor-o-Velho | 1,150.57 mi (1,851.66 km) |
| Groningen to Montijo | 1,243.45 mi (2,001.15 km) |
| Groningen to Mortagua | 1,122.16 mi (1,805.95 km) |
| Groningen to Moura | 1,237.67 mi (1,991.84 km) |
| Groningen to Murtosa | 1,116.59 mi (1,796.98 km) |
| Groningen to Nazare | 1,194.47 mi (1,922.32 km) |
| Groningen to Nelas | 1,106.37 mi (1,780.54 km) |
| Groningen to Obidos | 1,211.16 mi (1,949.17 km) |
| Groningen to Odemira | 1,301.95 mi (2,095.28 km) |
| Groningen to Odivelas | 1,245.00 mi (2,003.63 km) |
| Groningen to Oeiras | 1,255.17 mi (2,020.00 km) |
| Groningen to Olhao | 1,315.38 mi (2,116.90 km) |
| Groningen to Oliveira de Azemeis | 1,105.83 mi (1,779.66 km) |
| Groningen to Oliveira de Frades | 1,104.37 mi (1,777.31 km) |
