| Gahanna to Olivares | 4,004.51 mi (6,444.64 km) |
| Gahanna to Olivenza | 3,917.75 mi (6,305.01 km) |
| Gahanna to Olot | 4,246.23 mi (6,833.65 km) |
| Gahanna to Onate | 3,998.74 mi (6,435.34 km) |
| Gahanna to Onda | 4,197.22 mi (6,754.77 km) |
| Gahanna to Onteniente | 4,220.33 mi (6,791.97 km) |
| Gahanna to Orihuela | 4,229.87 mi (6,807.32 km) |
| Gahanna to Osuna | 4,061.20 mi (6,535.87 km) |
| Gahanna to Ourense | 3,770.78 mi (6,068.49 km) |
| Gahanna to Oviedo | 3,833.65 mi (6,169.66 km) |
| Gahanna to Paiporta | 4,208.33 mi (6,772.65 km) |
| Gahanna to Pajara | 3,915.35 mi (6,301.15 km) |
| Gahanna to Palafolls | 4,275.54 mi (6,880.82 km) |
| Gahanna to Palafrugell | 4,285.33 mi (6,896.58 km) |
| Gahanna to Palamos | 4,286.29 mi (6,898.13 km) |
