| Oristano to Montemor-o-Novo | 901.81 mi (1,451.32 km) |
| Oristano to Montemor-o-Velho | 912.59 mi (1,468.67 km) |
| Oristano to Montijo | 937.59 mi (1,508.91 km) |
| Oristano to Mortagua | 887.71 mi (1,428.63 km) |
| Oristano to Moura | 868.58 mi (1,397.84 km) |
| Oristano to Murtosa | 907.75 mi (1,460.88 km) |
| Oristano to Nazare | 936.71 mi (1,507.49 km) |
| Oristano to Nelas | 867.30 mi (1,395.79 km) |
| Oristano to Obidos | 943.70 mi (1,518.73 km) |
| Oristano to Odemira | 940.46 mi (1,513.52 km) |
| Oristano to Odivelas | 951.07 mi (1,530.60 km) |
| Oristano to Oeiras | 959.68 mi (1,544.45 km) |
| Oristano to Olhao | 909.56 mi (1,463.79 km) |
| Oristano to Oliveira de Azemeis | 899.25 mi (1,447.20 km) |
| Oristano to Oliveira de Frades | 884.24 mi (1,423.04 km) |
