| Oregon to Montalegre | 3,762.79 mi (6,055.63 km) |
| Oregon to Montemor-o-Novo | 3,846.22 mi (6,189.90 km) |
| Oregon to Montemor-o-Velho | 3,774.44 mi (6,074.38 km) |
| Oregon to Montijo | 3,812.82 mi (6,136.15 km) |
| Oregon to Mortagua | 3,786.80 mi (6,094.26 km) |
| Oregon to Moura | 3,899.90 mi (6,276.28 km) |
| Oregon to Murtosa | 3,758.58 mi (6,048.84 km) |
| Oregon to Nazare | 3,774.85 mi (6,075.04 km) |
| Oregon to Nelas | 3,801.90 mi (6,118.56 km) |
| Oregon to Obidos | 3,778.45 mi (6,080.82 km) |
| Oregon to Odemira | 3,862.43 mi (6,215.98 km) |
| Oregon to Odivelas | 3,796.05 mi (6,109.15 km) |
| Oregon to Oeiras | 3,793.09 mi (6,104.40 km) |
| Oregon to Olhao | 3,919.34 mi (6,307.57 km) |
| Oregon to Oliveira de Azemeis | 3,762.51 mi (6,055.18 km) |
