| Orvieto to Montemor-o-Novo | 1,098.48 mi (1,767.84 km) |
| Orvieto to Montemor-o-Velho | 1,088.45 mi (1,751.69 km) |
| Orvieto to Montijo | 1,132.04 mi (1,821.84 km) |
| Orvieto to Mortagua | 1,060.64 mi (1,706.93 km) |
| Orvieto to Moura | 1,073.63 mi (1,727.84 km) |
| Orvieto to Murtosa | 1,075.68 mi (1,731.14 km) |
| Orvieto to Nazare | 1,119.36 mi (1,801.43 km) |
| Orvieto to Nelas | 1,039.69 mi (1,673.21 km) |
| Orvieto to Obidos | 1,129.23 mi (1,817.32 km) |
| Orvieto to Odemira | 1,148.04 mi (1,847.59 km) |
| Orvieto to Odivelas | 1,143.52 mi (1,840.31 km) |
| Orvieto to Oeiras | 1,153.04 mi (1,855.63 km) |
| Orvieto to Olhao | 1,125.37 mi (1,811.11 km) |
| Orvieto to Oliveira de Azemeis | 1,065.86 mi (1,715.34 km) |
| Orvieto to Oliveira de Frades | 1,053.12 mi (1,694.83 km) |
