| Orbassano to Montemor-o-Novo | 920.12 mi (1,480.79 km) |
| Orbassano to Montemor-o-Velho | 888.35 mi (1,429.66 km) |
| Orbassano to Montijo | 949.74 mi (1,528.46 km) |
| Orbassano to Mortagua | 858.85 mi (1,382.18 km) |
| Orbassano to Moura | 906.53 mi (1,458.92 km) |
| Orbassano to Murtosa | 868.62 mi (1,397.91 km) |
| Orbassano to Nazare | 924.83 mi (1,488.37 km) |
| Orbassano to Nelas | 838.27 mi (1,349.06 km) |
| Orbassano to Obidos | 937.31 mi (1,508.46 km) |
| Orbassano to Odemira | 981.03 mi (1,578.81 km) |
| Orbassano to Odivelas | 958.53 mi (1,542.60 km) |
| Orbassano to Oeiras | 968.71 mi (1,558.99 km) |
| Orbassano to Olhao | 970.43 mi (1,561.75 km) |
| Orbassano to Oliveira de Azemeis | 858.00 mi (1,380.81 km) |
| Orbassano to Oliveira de Frades | 847.84 mi (1,364.46 km) |
