| Great Falls to Montalegre | 4,700.65 mi (7,564.97 km) |
| Great Falls to Montemor-o-Novo | 4,840.56 mi (7,790.13 km) |
| Great Falls to Montemor-o-Velho | 4,748.58 mi (7,642.09 km) |
| Great Falls to Montijo | 4,813.05 mi (7,745.85 km) |
| Great Falls to Mortagua | 4,752.30 mi (7,648.09 km) |
| Great Falls to Moura | 4,895.10 mi (7,877.90 km) |
| Great Falls to Murtosa | 4,722.80 mi (7,600.62 km) |
| Great Falls to Nazare | 4,761.86 mi (7,663.48 km) |
| Great Falls to Nelas | 4,762.42 mi (7,664.37 km) |
| Great Falls to Obidos | 4,770.24 mi (7,676.96 km) |
| Great Falls to Odemira | 4,877.40 mi (7,849.41 km) |
| Great Falls to Odivelas | 4,797.18 mi (7,720.32 km) |
| Great Falls to Oeiras | 4,797.21 mi (7,720.36 km) |
| Great Falls to Olhao | 4,935.35 mi (7,942.68 km) |
| Great Falls to Oliveira de Azemeis | 4,723.47 mi (7,601.70 km) |
