| Cincinnati to Mangualde | 3,932.64 mi (6,328.97 km) |
| Cincinnati to Marco de Canavezes | 3,897.10 mi (6,271.78 km) |
| Cincinnati to Marinha Grande | 3,902.49 mi (6,280.45 km) |
| Cincinnati to Massama | 3,916.08 mi (6,302.32 km) |
| Cincinnati to Matosinhos | 3,871.20 mi (6,230.09 km) |
| Cincinnati to Mealhada | 3,906.60 mi (6,287.07 km) |
| Cincinnati to Melgaco | 3,864.50 mi (6,219.31 km) |
| Cincinnati to Melres | 3,888.75 mi (6,258.34 km) |
| Cincinnati to Mira | 3,891.66 mi (6,263.02 km) |
| Cincinnati to Miranda do Corvo | 3,920.63 mi (6,309.64 km) |
| Cincinnati to Mirandela | 3,933.59 mi (6,330.49 km) |
| Cincinnati to Mogadouro | 3,959.85 mi (6,372.77 km) |
| Cincinnati to Moimenta da Beira | 3,928.37 mi (6,322.10 km) |
| Cincinnati to Moita | 3,933.44 mi (6,330.26 km) |
| Cincinnati to Moncao | 3,855.79 mi (6,205.30 km) |
