| Corvallis to Montalegre | 5,260.83 mi (8,466.50 km) |
| Corvallis to Montemor-o-Novo | 5,410.62 mi (8,707.55 km) |
| Corvallis to Montemor-o-Velho | 5,315.59 mi (8,554.61 km) |
| Corvallis to Montijo | 5,384.52 mi (8,665.55 km) |
| Corvallis to Mortagua | 5,317.55 mi (8,557.77 km) |
| Corvallis to Moura | 5,464.80 mi (8,794.75 km) |
| Corvallis to Murtosa | 5,288.11 mi (8,510.39 km) |
| Corvallis to Nazare | 5,331.27 mi (8,579.85 km) |
| Corvallis to Nelas | 5,326.55 mi (8,572.25 km) |
| Corvallis to Obidos | 5,340.50 mi (8,594.70 km) |
| Corvallis to Odemira | 5,451.09 mi (8,772.69 km) |
| Corvallis to Odivelas | 5,368.98 mi (8,640.53 km) |
| Corvallis to Oeiras | 5,369.57 mi (8,641.50 km) |
| Corvallis to Olhao | 5,508.73 mi (8,865.44 km) |
| Corvallis to Oliveira de Azemeis | 5,288.12 mi (8,510.40 km) |
