| Gahanna to Hanahan (South Carolina) | 515.25 mi (829.22 km) |
| Gahanna to Hanford (California) | 2,000.27 mi (3,219.13 km) |
| Gahanna to Hannibal (Missouri) | 452.72 mi (728.58 km) |
| Gahanna to Hanover (Pennsylvania) | 311.89 mi (501.94 km) |
| Gahanna to Hanover Park (Illinois) | 306.68 mi (493.56 km) |
| Gahanna to Happy Valley (Oregon) | 2,025.27 mi (3,259.36 km) |
| Gahanna to Harker Heights (Texas) | 1,034.22 mi (1,664.42 km) |
| Gahanna to Harlingen (Texas) | 1,281.09 mi (2,061.72 km) |
| Gahanna to Harper Woods (Michigan) | 166.82 mi (268.47 km) |
| Gahanna to Harrisburg (North Carolina) | 347.38 mi (559.06 km) |
| Gahanna to Harrisburg (Pennsylvania) | 316.20 mi (508.87 km) |
| Gahanna to Harrison (Arkansas) | 615.06 mi (989.84 km) |
| Gahanna to Harrison (New Jersey) | 460.92 mi (741.78 km) |
| Gahanna to Harrison (New York) | 484.96 mi (780.47 km) |
| Gahanna to Harrison (Ohio) | 115.22 mi (185.42 km) |
