| Seabrook to Montalegre | 3,537.99 mi (5,693.85 km) |
| Seabrook to Montemor-o-Novo | 3,600.85 mi (5,795.01 km) |
| Seabrook to Montemor-o-Velho | 3,537.23 mi (5,692.62 km) |
| Seabrook to Montijo | 3,566.09 mi (5,739.07 km) |
| Seabrook to Mortagua | 3,552.23 mi (5,716.77 km) |
| Seabrook to Moura | 3,653.24 mi (5,879.33 km) |
| Seabrook to Murtosa | 3,525.01 mi (5,672.96 km) |
| Seabrook to Nazare | 3,533.29 mi (5,686.28 km) |
| Seabrook to Nelas | 3,568.70 mi (5,743.27 km) |
| Seabrook to Obidos | 3,535.20 mi (5,689.36 km) |
| Seabrook to Odemira | 3,609.84 mi (5,809.47 km) |
| Seabrook to Odivelas | 3,549.32 mi (5,712.08 km) |
| Seabrook to Oeiras | 3,545.42 mi (5,705.80 km) |
| Seabrook to Olhao | 3,665.40 mi (5,898.90 km) |
| Seabrook to Oliveira de Azemeis | 3,529.97 mi (5,680.94 km) |
