| Biddeford to Montalegre | 3,109.01 mi (5,003.46 km) |
| Biddeford to Montemor-o-Novo | 3,183.50 mi (5,123.35 km) |
| Biddeford to Montemor-o-Velho | 3,114.90 mi (5,012.95 km) |
| Biddeford to Montijo | 3,149.56 mi (5,068.73 km) |
| Biddeford to Mortagua | 3,128.42 mi (5,034.71 km) |
| Biddeford to Moura | 3,236.76 mi (5,209.06 km) |
| Biddeford to Murtosa | 3,100.61 mi (4,989.96 km) |
| Biddeford to Nazare | 3,113.52 mi (5,010.73 km) |
| Biddeford to Nelas | 3,144.16 mi (5,060.03 km) |
| Biddeford to Obidos | 3,116.46 mi (5,015.46 km) |
| Biddeford to Odemira | 3,197.21 mi (5,145.41 km) |
| Biddeford to Odivelas | 3,132.78 mi (5,041.72 km) |
| Biddeford to Oeiras | 3,129.48 mi (5,036.40 km) |
| Biddeford to Olhao | 3,253.74 mi (5,236.39 km) |
| Biddeford to Oliveira de Azemeis | 3,105.02 mi (4,997.04 km) |
