| Potomac to Havelock (North Carolina) | 284.19 mi (457.35 km) |
| Potomac to Haverhill (Massachusetts) | 411.59 mi (662.39 km) |
| Potomac to Havre de Grace (Maryland) | 68.52 mi (110.27 km) |
| Potomac to Hawaiian Gardens (California) | 2,281.41 mi (3,671.58 km) |
| Potomac to Hawaiian Paradise Park (Hawaii) | 4,735.01 mi (7,620.27 km) |
| Potomac to Hawthorne (California) | 2,294.04 mi (3,691.90 km) |
| Potomac to Hawthorne (New Jersey) | 209.43 mi (337.05 km) |
| Potomac to Hayden (Idaho) | 2,053.54 mi (3,304.86 km) |
| Potomac to Hayesville (Oregon) | 2,354.50 mi (3,789.21 km) |
| Potomac to Hays (Kansas) | 1,186.13 mi (1,908.89 km) |
| Potomac to Haysville (Kansas) | 1,095.53 mi (1,763.08 km) |
| Potomac to Hayward (California) | 2,409.80 mi (3,878.20 km) |
| Potomac to Hazel Crest (Illinois) | 580.25 mi (933.82 km) |
| Potomac to Hazel Dell (Washington) | 2,334.25 mi (3,756.61 km) |
| Potomac to Hazel Park (Michigan) | 390.04 mi (627.72 km) |
