| Preakness to Montalegre | 3,354.20 mi (5,398.06 km) |
| Preakness to Montemor-o-Novo | 3,421.78 mi (5,506.82 km) |
| Preakness to Montemor-o-Velho | 3,356.12 mi (5,401.15 km) |
| Preakness to Montijo | 3,387.34 mi (5,451.39 km) |
| Preakness to Mortagua | 3,370.53 mi (5,424.35 km) |
| Preakness to Moura | 3,474.55 mi (5,591.74 km) |
| Preakness to Murtosa | 3,343.06 mi (5,380.14 km) |
| Preakness to Nazare | 3,353.21 mi (5,396.47 km) |
| Preakness to Nelas | 3,386.71 mi (5,450.38 km) |
| Preakness to Obidos | 3,355.54 mi (5,400.22 km) |
| Preakness to Odemira | 3,432.68 mi (5,524.37 km) |
| Preakness to Odivelas | 3,370.55 mi (5,424.38 km) |
| Preakness to Oeiras | 3,366.89 mi (5,418.49 km) |
| Preakness to Olhao | 3,488.67 mi (5,614.47 km) |
| Preakness to Oliveira de Azemeis | 3,347.80 mi (5,387.76 km) |
