| Prestonpans to Montalegre | 1,000.48 mi (1,610.12 km) |
| Prestonpans to Montemor-o-Novo | 1,220.20 mi (1,963.72 km) |
| Prestonpans to Montemor-o-Velho | 1,121.78 mi (1,805.33 km) |
| Prestonpans to Montijo | 1,224.56 mi (1,970.74 km) |
| Prestonpans to Mortagua | 1,099.11 mi (1,768.85 km) |
| Prestonpans to Moura | 1,249.03 mi (2,010.12 km) |
| Prestonpans to Murtosa | 1,082.91 mi (1,742.77 km) |
| Prestonpans to Nazare | 1,164.24 mi (1,873.66 km) |
| Prestonpans to Nelas | 1,089.79 mi (1,753.85 km) |
| Prestonpans to Obidos | 1,181.59 mi (1,901.59 km) |
| Prestonpans to Odemira | 1,296.68 mi (2,086.81 km) |
| Prestonpans to Odivelas | 1,220.25 mi (1,963.80 km) |
| Prestonpans to Oeiras | 1,228.98 mi (1,977.85 km) |
| Prestonpans to Olhao | 1,327.82 mi (2,136.91 km) |
| Prestonpans to Oliveira de Azemeis | 1,074.01 mi (1,728.45 km) |
