| Opelousas to Montalegre | 4,578.22 mi (7,367.93 km) |
| Opelousas to Montemor-o-Novo | 4,636.16 mi (7,461.19 km) |
| Opelousas to Montemor-o-Velho | 4,575.07 mi (7,362.87 km) |
| Opelousas to Montijo | 4,601.01 mi (7,404.61 km) |
| Opelousas to Mortagua | 4,590.69 mi (7,388.01 km) |
| Opelousas to Moura | 4,688.00 mi (7,544.61 km) |
| Opelousas to Murtosa | 4,563.73 mi (7,344.61 km) |
| Opelousas to Nazare | 4,569.95 mi (7,354.63 km) |
| Opelousas to Nelas | 4,607.44 mi (7,414.96 km) |
| Opelousas to Obidos | 4,571.35 mi (7,356.88 km) |
| Opelousas to Odemira | 4,642.39 mi (7,471.20 km) |
| Opelousas to Odivelas | 4,584.28 mi (7,377.69 km) |
| Opelousas to Oeiras | 4,580.05 mi (7,370.87 km) |
| Opelousas to Olhao | 4,697.22 mi (7,559.45 km) |
| Opelousas to Oliveira de Azemeis | 4,568.89 mi (7,352.92 km) |
