| Giffnock to Hormigueros (Puerto Rico) | 4,138.83 mi (6,660.80 km) |
| Giffnock to Horn Lake (Mississippi) | 4,109.21 mi (6,613.14 km) |
| Giffnock to Hot Springs (Arkansas) | 4,243.54 mi (6,829.31 km) |
| Giffnock to Hot Springs Village (Arkansas) | 4,231.53 mi (6,809.98 km) |
| Giffnock to Houma (Louisiana) | 4,419.66 mi (7,112.75 km) |
| Giffnock to Houston (Texas) | 4,582.50 mi (7,374.82 km) |
| Giffnock to Howard (Wisconsin) | 3,552.21 mi (5,716.73 km) |
| Giffnock to Huber Heights (Ohio) | 3,639.30 mi (5,856.89 km) |
| Giffnock to Hudson (Florida) | 4,180.35 mi (6,727.63 km) |
| Giffnock to Hudson (Ohio) | 3,472.81 mi (5,588.94 km) |
| Giffnock to Hudson (Wisconsin) | 3,693.89 mi (5,944.75 km) |
| Giffnock to Hueytown (Alabama) | 4,076.74 mi (6,560.89 km) |
| Giffnock to Hugo (Minnesota) | 3,691.63 mi (5,941.10 km) |
| Giffnock to Humacao (Puerto Rico) | 4,089.17 mi (6,580.88 km) |
| Giffnock to Humble (Texas) | 4,566.73 mi (7,349.45 km) |
