| Potomac to Home Gardens (California) | 2,250.16 mi (3,621.29 km) |
| Potomac to Homer Glen (Illinois) | 593.79 mi (955.62 km) |
| Potomac to Homestead (Florida) | 954.96 mi (1,536.86 km) |
| Potomac to Homewood (Alabama) | 658.36 mi (1,059.53 km) |
| Potomac to Homewood (Illinois) | 578.56 mi (931.10 km) |
| Potomac to Homosassa Springs (Florida) | 768.25 mi (1,236.38 km) |
| Potomac to Honeygo (Maryland) | 49.13 mi (79.06 km) |
| Potomac to Honolulu (Hawaii) | 4,817.48 mi (7,752.99 km) |
| Potomac to Hoover (Alabama) | 661.95 mi (1,065.30 km) |
| Potomac to Hopatcong (New Jersey) | 189.66 mi (305.23 km) |
| Potomac to Hope Mills (North Carolina) | 295.83 mi (476.10 km) |
| Potomac to Hopewell (Virginia) | 119.15 mi (191.76 km) |
| Potomac to Hopkins (Minnesota) | 925.30 mi (1,489.13 km) |
| Potomac to Hopkinsville (Kentucky) | 579.89 mi (933.25 km) |
| Potomac to Horizon City (Texas) | 1,702.53 mi (2,739.96 km) |
