| Cincinnati to Montalegre | 3,895.15 mi (6,268.64 km) |
| Cincinnati to Montemor-o-Novo | 3,970.46 mi (6,389.84 km) |
| Cincinnati to Montemor-o-Velho | 3,901.96 mi (6,279.61 km) |
| Cincinnati to Montijo | 3,936.44 mi (6,335.09 km) |
| Cincinnati to Mortagua | 3,915.40 mi (6,301.22 km) |
| Cincinnati to Moura | 4,023.65 mi (6,475.44 km) |
| Cincinnati to Murtosa | 3,887.54 mi (6,256.39 km) |
| Cincinnati to Nazare | 3,900.60 mi (6,277.41 km) |
| Cincinnati to Nelas | 3,931.06 mi (6,326.43 km) |
| Cincinnati to Obidos | 3,903.50 mi (6,282.08 km) |
| Cincinnati to Odemira | 3,983.57 mi (6,410.94 km) |
| Cincinnati to Odivelas | 3,919.65 mi (6,308.07 km) |
| Cincinnati to Oeiras | 3,916.29 mi (6,302.66 km) |
| Cincinnati to Olhao | 4,039.95 mi (6,501.67 km) |
| Cincinnati to Oliveira de Azemeis | 3,891.88 mi (6,263.38 km) |
