| Ommen to Montemor-o-Novo | 1,186.24 mi (1,909.07 km) |
| Ommen to Montemor-o-Velho | 1,112.06 mi (1,789.68 km) |
| Ommen to Montijo | 1,203.78 mi (1,937.30 km) |
| Ommen to Mortagua | 1,083.40 mi (1,743.56 km) |
| Ommen to Moura | 1,196.05 mi (1,924.86 km) |
| Ommen to Murtosa | 1,078.63 mi (1,735.88 km) |
| Ommen to Nazare | 1,155.83 mi (1,860.13 km) |
| Ommen to Nelas | 1,067.24 mi (1,717.56 km) |
| Ommen to Obidos | 1,172.38 mi (1,886.77 km) |
| Ommen to Odemira | 1,261.13 mi (2,029.60 km) |
| Ommen to Odivelas | 1,205.73 mi (1,940.43 km) |
| Ommen to Oeiras | 1,215.95 mi (1,956.88 km) |
| Ommen to Olhao | 1,273.41 mi (2,049.35 km) |
| Ommen to Oliveira de Azemeis | 1,067.80 mi (1,718.45 km) |
| Ommen to Oliveira de Frades | 1,065.85 mi (1,715.32 km) |
