| Gahanna to Oakley (California) | 2,073.03 mi (3,336.22 km) |
| Gahanna to Oakton (Virginia) | 306.88 mi (493.87 km) |
| Gahanna to Oakville (Missouri) | 413.49 mi (665.45 km) |
| Gahanna to Oatfield (Oregon) | 2,029.53 mi (3,266.21 km) |
| Gahanna to Ocala (Florida) | 750.55 mi (1,207.89 km) |
| Gahanna to Ocean Acres (New Jersey) | 455.31 mi (732.75 km) |
| Gahanna to Ocean City (New Jersey) | 442.47 mi (712.09 km) |
| Gahanna to Ocean Pines (Maryland) | 428.16 mi (689.05 km) |
| Gahanna to Ocean Pointe (Hawaii) | 4,518.11 mi (7,271.20 km) |
| Gahanna to Ocean Springs (Mississippi) | 743.36 mi (1,196.32 km) |
| Gahanna to Oceanside (California) | 1,953.87 mi (3,144.45 km) |
| Gahanna to Oceanside (New York) | 487.61 mi (784.73 km) |
| Gahanna to Ocoee (Florida) | 794.42 mi (1,278.49 km) |
| Gahanna to Oconomowoc (Wisconsin) | 360.24 mi (579.76 km) |
| Gahanna to Odenton (Maryland) | 335.26 mi (539.55 km) |
