| London Colney to Hormigueros (Puerto Rico) | 4,253.72 mi (6,845.70 km) |
| London Colney to Horn Lake (Mississippi) | 4,361.91 mi (7,019.81 km) |
| London Colney to Hot Springs (Arkansas) | 4,502.30 mi (7,245.76 km) |
| London Colney to Hot Springs Village (Arkansas) | 4,490.52 mi (7,226.79 km) |
| London Colney to Houma (Louisiana) | 4,659.36 mi (7,498.52 km) |
| London Colney to Houston (Texas) | 4,835.33 mi (7,781.71 km) |
| London Colney to Howard (Wisconsin) | 3,827.33 mi (6,159.49 km) |
| London Colney to Huber Heights (Ohio) | 3,892.10 mi (6,263.73 km) |
| London Colney to Hudson (Florida) | 4,392.30 mi (7,068.73 km) |
| London Colney to Hudson (Ohio) | 3,723.85 mi (5,992.96 km) |
| London Colney to Hudson (Wisconsin) | 3,978.13 mi (6,402.18 km) |
| London Colney to Hueytown (Alabama) | 4,317.24 mi (6,947.92 km) |
| London Colney to Hugo (Minnesota) | 3,976.72 mi (6,399.92 km) |
| London Colney to Humacao (Puerto Rico) | 4,198.09 mi (6,756.18 km) |
| London Colney to Humble (Texas) | 4,819.75 mi (7,756.64 km) |
