| Gahanna to Orangevale (California) | 2,035.38 mi (3,275.62 km) |
| Gahanna to Orchards (Washington) | 2,025.31 mi (3,259.42 km) |
| Gahanna to Orcutt (California) | 2,075.13 mi (3,339.59 km) |
| Gahanna to Oregon (Ohio) | 116.29 mi (187.16 km) |
| Gahanna to Oregon (Wisconsin) | 392.60 mi (631.83 km) |
| Gahanna to Oregon City (Oregon) | 2,029.78 mi (3,266.61 km) |
| Gahanna to Orem (Utah) | 1,515.95 mi (2,439.69 km) |
| Gahanna to Orinda (California) | 2,100.51 mi (3,380.44 km) |
| Gahanna to Orland Park (Illinois) | 283.25 mi (455.84 km) |
| Gahanna to Orlando (Florida) | 802.59 mi (1,291.64 km) |
| Gahanna to Ormond Beach (Florida) | 747.82 mi (1,203.51 km) |
| Gahanna to Oro Valley (Arizona) | 1,644.59 mi (2,646.71 km) |
| Gahanna to Oroville (California) | 2,039.34 mi (3,282.00 km) |
| Gahanna to Oshkosh (Wisconsin) | 402.09 mi (647.11 km) |
| Gahanna to Oskaloosa (Iowa) | 519.57 mi (836.17 km) |
