| Cincinnati to Noventa Vicentina | 4,627.50 mi (7,447.24 km) |
| Cincinnati to Novi di Modena | 4,616.28 mi (7,429.18 km) |
| Cincinnati to Novi Ligure | 4,533.63 mi (7,296.17 km) |
| Cincinnati to Nuoro | 4,723.02 mi (7,600.97 km) |
| Cincinnati to Occhiobello | 4,643.12 mi (7,472.38 km) |
| Cincinnati to Oderzo | 4,647.50 mi (7,479.43 km) |
| Cincinnati to Oggiono | 4,519.76 mi (7,273.85 km) |
| Cincinnati to Olbia | 4,707.38 mi (7,575.79 km) |
| Cincinnati to Oleggio | 4,496.90 mi (7,237.06 km) |
| Cincinnati to Olgiate Comasco | 4,504.03 mi (7,248.53 km) |
| Cincinnati to Olgiate Olona | 4,506.01 mi (7,251.72 km) |
| Cincinnati to Omegna | 4,477.60 mi (7,206.00 km) |
| Cincinnati to Opera | 4,528.81 mi (7,288.42 km) |
| Cincinnati to Oppeano | 4,612.60 mi (7,423.26 km) |
| Cincinnati to Orbassano | 4,472.52 mi (7,197.82 km) |
