| Cincinnati to Oak Harbor (Washington) | 1,982.77 mi (3,190.96 km) |
| Cincinnati to Oak Hills (Oregon) | 1,987.09 mi (3,197.92 km) |
| Cincinnati to Oak Lawn (Illinois) | 246.45 mi (396.62 km) |
| Cincinnati to Oak Park (California) | 1,917.80 mi (3,086.40 km) |
| Cincinnati to Oak Park (Illinois) | 256.38 mi (412.60 km) |
| Cincinnati to Oak Park (Michigan) | 239.84 mi (385.98 km) |
| Cincinnati to Oak Ridge (Florida) | 758.02 mi (1,219.92 km) |
| Cincinnati to Oak Ridge (New Jersey) | 544.63 mi (876.50 km) |
| Cincinnati to Oak Ridge (Tennessee) | 219.84 mi (353.81 km) |
| Cincinnati to Oakdale (California) | 1,955.52 mi (3,147.11 km) |
| Cincinnati to Oakdale (Minnesota) | 592.18 mi (953.02 km) |
| Cincinnati to Oakland (California) | 2,027.50 mi (3,262.95 km) |
| Cincinnati to Oakland (New Jersey) | 557.76 mi (897.63 km) |
| Cincinnati to Oakland Park (Florida) | 930.45 mi (1,497.41 km) |
| Cincinnati to Oakleaf Plantation (Florida) | 638.18 mi (1,027.04 km) |
