| Greenock to Hormigueros (Puerto Rico) | 4,123.20 mi (6,635.65 km) |
| Greenock to Horn Lake (Mississippi) | 4,088.76 mi (6,580.23 km) |
| Greenock to Hot Springs (Arkansas) | 4,222.98 mi (6,796.23 km) |
| Greenock to Hot Springs Village (Arkansas) | 4,210.97 mi (6,776.89 km) |
| Greenock to Houma (Louisiana) | 4,399.47 mi (7,080.27 km) |
| Greenock to Houston (Texas) | 4,562.03 mi (7,341.88 km) |
| Greenock to Howard (Wisconsin) | 3,531.46 mi (5,683.33 km) |
| Greenock to Huber Heights (Ohio) | 3,618.87 mi (5,824.01 km) |
| Greenock to Hudson (Florida) | 4,160.94 mi (6,696.38 km) |
| Greenock to Hudson (Ohio) | 3,452.42 mi (5,556.13 km) |
| Greenock to Hudson (Wisconsin) | 3,673.10 mi (5,911.28 km) |
| Greenock to Hueytown (Alabama) | 4,056.56 mi (6,528.40 km) |
| Greenock to Hugo (Minnesota) | 3,670.83 mi (5,907.63 km) |
| Greenock to Humacao (Puerto Rico) | 4,073.82 mi (6,556.18 km) |
| Greenock to Humble (Texas) | 4,546.27 mi (7,316.51 km) |
