| Omurtag to Montemor-o-Novo | 1,822.03 mi (2,932.27 km) |
| Omurtag to Montemor-o-Velho | 1,810.58 mi (2,913.84 km) |
| Omurtag to Montijo | 1,855.65 mi (2,986.38 km) |
| Omurtag to Mortagua | 1,782.38 mi (2,868.46 km) |
| Omurtag to Moura | 1,796.36 mi (2,890.97 km) |
| Omurtag to Murtosa | 1,796.30 mi (2,890.87 km) |
| Omurtag to Nazare | 1,842.34 mi (2,964.96 km) |
| Omurtag to Nelas | 1,761.43 mi (2,834.75 km) |
| Omurtag to Obidos | 1,852.48 mi (2,981.28 km) |
| Omurtag to Odemira | 1,870.52 mi (3,010.31 km) |
| Omurtag to Odivelas | 1,867.12 mi (3,004.83 km) |
| Omurtag to Oeiras | 1,876.64 mi (3,020.17 km) |
| Omurtag to Olhao | 1,845.83 mi (2,970.58 km) |
| Omurtag to Oliveira de Azemeis | 1,786.24 mi (2,874.68 km) |
| Omurtag to Oliveira de Frades | 1,774.09 mi (2,855.12 km) |
