| Cincinnati to Opole | 4,665.22 mi (7,507.95 km) |
| Cincinnati to Orzesze | 4,715.20 mi (7,588.38 km) |
| Cincinnati to Osowa | 4,536.82 mi (7,301.31 km) |
| Cincinnati to Ostroda | 4,615.28 mi (7,427.58 km) |
| Cincinnati to Ostroleka | 4,694.35 mi (7,554.83 km) |
| Cincinnati to Ostrow Mazowiecka | 4,716.48 mi (7,590.45 km) |
| Cincinnati to Ostrow Wielkopolski | 4,622.37 mi (7,438.98 km) |
| Cincinnati to Ostrowiec Swietokrzyski | 4,776.88 mi (7,687.65 km) |
| Cincinnati to Ostrzeszow | 4,635.63 mi (7,460.33 km) |
| Cincinnati to Oswiecim | 4,736.67 mi (7,622.94 km) |
| Cincinnati to Otwock | 4,723.30 mi (7,601.42 km) |
| Cincinnati to Ozarow Mazowiecki | 4,703.28 mi (7,569.21 km) |
| Cincinnati to Ozimek | 4,675.00 mi (7,523.69 km) |
| Cincinnati to Ozorkow | 4,661.17 mi (7,501.43 km) |
| Cincinnati to Pabianice | 4,677.34 mi (7,527.46 km) |
