| Gahanna to Noventa Vicentina | 4,521.26 mi (7,276.27 km) |
| Gahanna to Novi di Modena | 4,509.95 mi (7,258.06 km) |
| Gahanna to Novi Ligure | 4,427.17 mi (7,124.83 km) |
| Gahanna to Nuoro | 4,616.37 mi (7,429.32 km) |
| Gahanna to Occhiobello | 4,536.83 mi (7,301.33 km) |
| Gahanna to Oderzo | 4,541.42 mi (7,308.70 km) |
| Gahanna to Oggiono | 4,413.46 mi (7,102.77 km) |
| Gahanna to Olbia | 4,600.72 mi (7,404.14 km) |
| Gahanna to Oleggio | 4,390.52 mi (7,065.87 km) |
| Gahanna to Olgiate Comasco | 4,397.70 mi (7,077.41 km) |
| Gahanna to Olgiate Olona | 4,399.65 mi (7,080.56 km) |
| Gahanna to Omegna | 4,371.25 mi (7,034.84 km) |
| Gahanna to Opera | 4,422.44 mi (7,117.23 km) |
| Gahanna to Oppeano | 4,506.34 mi (7,252.26 km) |
| Gahanna to Orbassano | 4,366.02 mi (7,026.44 km) |
