| Potomac to Heswall | 3,509.70 mi (5,648.31 km) |
| Potomac to Hetton le Hole | 3,546.93 mi (5,708.23 km) |
| Potomac to Hexham | 3,519.22 mi (5,663.64 km) |
| Potomac to Heysham | 3,504.84 mi (5,640.49 km) |
| Potomac to Heywood | 3,539.72 mi (5,696.63 km) |
| Potomac to High Blantyre | 3,429.65 mi (5,519.49 km) |
| Potomac to High Wycombe | 3,638.29 mi (5,855.26 km) |
| Potomac to Highbury | 3,666.48 mi (5,900.64 km) |
| Potomac to Highgate | 3,664.11 mi (5,896.81 km) |
| Potomac to Hilsea | 3,642.46 mi (5,861.97 km) |
| Potomac to Hinckley | 3,593.92 mi (5,783.86 km) |
| Potomac to Hindley | 3,527.03 mi (5,676.21 km) |
| Potomac to Hipperholme | 3,553.19 mi (5,718.31 km) |
| Potomac to Hitchin | 3,650.30 mi (5,874.59 km) |
| Potomac to Hockley | 3,695.18 mi (5,946.81 km) |
