| Potomac to Hickory Hills (Illinois) | 589.79 mi (949.18 km) |
| Potomac to Hicksville (New York) | 229.02 mi (368.57 km) |
| Potomac to Hidalgo (Texas) | 1,509.57 mi (2,429.42 km) |
| Potomac to High Point (North Carolina) | 259.15 mi (417.06 km) |
| Potomac to Highland (California) | 2,225.89 mi (3,582.23 km) |
| Potomac to Highland (Illinois) | 671.26 mi (1,080.29 km) |
| Potomac to Highland (Indiana) | 568.25 mi (914.51 km) |
| Potomac to Highland (Utah) | 1,829.69 mi (2,944.60 km) |
| Potomac to Highland City (Florida) | 809.50 mi (1,302.77 km) |
| Potomac to Highland Park (Illinois) | 597.89 mi (962.21 km) |
| Potomac to Highland Park (New Jersey) | 179.24 mi (288.47 km) |
| Potomac to Highland Springs (Virginia) | 101.31 mi (163.04 km) |
| Potomac to Highland Village (Texas) | 1,179.86 mi (1,898.80 km) |
| Potomac to Highlands Ranch (Colorado) | 1,480.12 mi (2,382.03 km) |
| Potomac to Hillcrest (California) | 2,292.10 mi (3,688.78 km) |
