| Potomac to Hutchinson (Kansas) | 1,118.92 mi (1,800.73 km) |
| Potomac to Hutchinson (Minnesota) | 969.13 mi (1,559.67 km) |
| Potomac to Hutto (Texas) | 1,290.75 mi (2,077.27 km) |
| Potomac to Hyattsville (Maryland) | 13.37 mi (21.52 km) |
| Potomac to Hybla Valley (Virginia) | 19.32 mi (31.10 km) |
| Potomac to Idaho Falls (Idaho) | 1,822.43 mi (2,932.92 km) |
| Potomac to Idylwood (Virginia) | 8.62 mi (13.88 km) |
| Potomac to Ilchester (Maryland) | 26.86 mi (43.22 km) |
| Potomac to Immokalee (Florida) | 903.60 mi (1,454.20 km) |
| Potomac to Imperial (California) | 2,172.61 mi (3,496.48 km) |
| Potomac to Imperial Beach (California) | 2,262.76 mi (3,641.55 km) |
| Potomac to Independence (Kentucky) | 394.94 mi (635.59 km) |
| Potomac to Independence (Missouri) | 919.17 mi (1,479.27 km) |
| Potomac to Indian Trail (North Carolina) | 332.33 mi (534.83 km) |
| Potomac to Indiana (Pennsylvania) | 152.21 mi (244.96 km) |
