| Potomac to Horwich | 3,527.01 mi (5,676.17 km) |
| Potomac to Houghton le Spring | 3,545.83 mi (5,706.47 km) |
| Potomac to Houghton Regis | 3,641.45 mi (5,860.34 km) |
| Potomac to Hounslow | 3,657.03 mi (5,885.42 km) |
| Potomac to Hove | 3,679.28 mi (5,921.23 km) |
| Potomac to Hoyland Nether | 3,572.18 mi (5,748.87 km) |
| Potomac to Hucclecote | 3,575.28 mi (5,753.85 km) |
| Potomac to Huddersfield | 3,556.00 mi (5,722.82 km) |
| Potomac to Huntingdon | 3,646.41 mi (5,868.33 km) |
| Potomac to Huntington | 3,578.20 mi (5,758.56 km) |
| Potomac to Huyton | 3,518.45 mi (5,662.40 km) |
| Potomac to Hwlffordd | 3,461.84 mi (5,571.30 km) |
| Potomac to Hyde | 3,547.83 mi (5,709.67 km) |
| Potomac to Hythe | 3,627.99 mi (5,838.69 km) |
| Potomac to Hythe | 3,725.56 mi (5,995.72 km) |
