| Gahanna to Hilliard (Ohio) | 15.58 mi (25.07 km) |
| Gahanna to Hillsboro (Oregon) | 2,045.55 mi (3,291.99 km) |
| Gahanna to Hillsborough (California) | 2,116.37 mi (3,405.96 km) |
| Gahanna to Hillsborough (New Jersey) | 434.04 mi (698.52 km) |
| Gahanna to Hilo (Hawaii) | 4,428.87 mi (7,127.58 km) |
| Gahanna to Hilton Head Island (South Carolina) | 554.04 mi (891.64 km) |
| Gahanna to Hinesville (Georgia) | 570.87 mi (918.72 km) |
| Gahanna to Hinsdale (Illinois) | 291.40 mi (468.97 km) |
| Gahanna to Hobart (Indiana) | 252.58 mi (406.48 km) |
| Gahanna to Hobbs (New Mexico) | 1,232.78 mi (1,983.96 km) |
| Gahanna to Hobe Sound (Florida) | 908.39 mi (1,461.91 km) |
| Gahanna to Hoboken (New Jersey) | 467.46 mi (752.30 km) |
| Gahanna to Hockessin (Delaware) | 380.94 mi (613.06 km) |
| Gahanna to Hoffman Estates (Illinois) | 309.17 mi (497.57 km) |
| Gahanna to Holbrook (New York) | 517.70 mi (833.16 km) |
