| Mount Washington to Montalegre | 3,982.11 mi (6,408.59 km) |
| Mount Washington to Montemor-o-Novo | 4,054.92 mi (6,525.77 km) |
| Mount Washington to Montemor-o-Velho | 3,987.47 mi (6,417.22 km) |
| Mount Washington to Montijo | 4,020.73 mi (6,470.73 km) |
| Mount Washington to Mortagua | 4,001.23 mi (6,439.36 km) |
| Mount Washington to Moura | 4,107.94 mi (6,611.10 km) |
| Mount Washington to Murtosa | 3,973.49 mi (6,394.72 km) |
| Mount Washington to Nazare | 3,985.56 mi (6,414.14 km) |
| Mount Washington to Nelas | 4,017.06 mi (6,464.83 km) |
| Mount Washington to Obidos | 3,988.24 mi (6,418.46 km) |
| Mount Washington to Odemira | 4,067.05 mi (6,545.28 km) |
| Mount Washington to Odivelas | 4,003.94 mi (6,443.72 km) |
| Mount Washington to Oeiras | 4,000.45 mi (6,438.10 km) |
| Mount Washington to Olhao | 4,123.23 mi (6,635.70 km) |
| Mount Washington to Oliveira de Azemeis | 3,977.96 mi (6,401.90 km) |
