| Gahanna to Nasaud | 4,936.05 mi (7,943.81 km) |
| Gahanna to Navodari | 5,223.20 mi (8,405.93 km) |
| Gahanna to Negresti-Oas | 4,874.97 mi (7,845.51 km) |
| Gahanna to Nehoiu | 5,091.40 mi (8,193.81 km) |
| Gahanna to Ocna Mures | 4,955.35 mi (7,974.86 km) |
| Gahanna to Odobesti | 5,100.24 mi (8,208.05 km) |
| Gahanna to Odorheiu Secuiesc | 5,011.49 mi (8,065.22 km) |
| Gahanna to Oltenita | 5,161.40 mi (8,306.48 km) |
| Gahanna to Onesti | 5,067.09 mi (8,154.69 km) |
| Gahanna to Oradea | 4,854.25 mi (7,812.16 km) |
| Gahanna to Orastie | 4,954.53 mi (7,973.55 km) |
| Gahanna to Oravita | 4,932.47 mi (7,938.04 km) |
| Gahanna to Orsova | 4,973.23 mi (8,003.64 km) |
| Gahanna to Otelu Rosu | 4,937.16 mi (7,945.59 km) |
| Gahanna to Otopeni | 5,119.23 mi (8,238.60 km) |
