| Potomac to Hereford (Texas) | 1,417.32 mi (2,280.96 km) |
| Potomac to Hermiston (Oregon) | 2,171.46 mi (3,494.63 km) |
| Potomac to Hermitage (Pennsylvania) | 229.93 mi (370.03 km) |
| Potomac to Hermosa Beach (California) | 2,297.86 mi (3,698.05 km) |
| Potomac to Hernando (Mississippi) | 762.25 mi (1,226.72 km) |
| Potomac to Herndon (Virginia) | 10.77 mi (17.34 km) |
| Potomac to Herriman (Utah) | 1,840.58 mi (2,962.13 km) |
| Potomac to Herrin (Illinois) | 645.86 mi (1,039.41 km) |
| Potomac to Hershey (Pennsylvania) | 92.24 mi (148.45 km) |
| Potomac to Hesperia (California) | 2,227.03 mi (3,584.05 km) |
| Potomac to Hewitt (Texas) | 1,240.27 mi (1,996.02 km) |
| Potomac to Hialeah (Florida) | 925.95 mi (1,490.18 km) |
| Potomac to Hialeah Gardens (Florida) | 925.31 mi (1,489.15 km) |
| Potomac to Hibbing (Minnesota) | 979.34 mi (1,576.09 km) |
| Potomac to Hickory (North Carolina) | 320.10 mi (515.16 km) |
