| Gahanna to Hazleton (Pennsylvania) | 367.62 mi (591.63 km) |
| Gahanna to Healdsburg (California) | 2,122.18 mi (3,415.31 km) |
| Gahanna to Heath (Ohio) | 22.35 mi (35.97 km) |
| Gahanna to Heber (Utah) | 1,498.18 mi (2,411.10 km) |
| Gahanna to Helena (Alabama) | 516.08 mi (830.55 km) |
| Gahanna to Helena (Montana) | 1,524.54 mi (2,453.51 km) |
| Gahanna to Hemet (California) | 1,923.39 mi (3,095.39 km) |
| Gahanna to Henderson (Kentucky) | 294.98 mi (474.72 km) |
| Gahanna to Henderson (Nevada) | 1,763.33 mi (2,837.80 km) |
| Gahanna to Henderson (North Carolina) | 351.64 mi (565.91 km) |
| Gahanna to Henderson (Texas) | 858.47 mi (1,381.57 km) |
| Gahanna to Hendersonville (North Carolina) | 325.52 mi (523.88 km) |
| Gahanna to Hendersonville (Tennessee) | 327.36 mi (526.83 km) |
| Gahanna to Hercules (California) | 2,102.10 mi (3,383.00 km) |
| Gahanna to Hereford (Texas) | 1,127.85 mi (1,815.11 km) |
