| London Colney to Hilliard (Ohio) | 3,846.41 mi (6,190.20 km) |
| London Colney to Hillsboro (Oregon) | 4,903.08 mi (7,890.74 km) |
| London Colney to Hillsborough (California) | 5,348.83 mi (8,608.11 km) |
| London Colney to Hillsborough (New Jersey) | 3,484.71 mi (5,608.10 km) |
| London Colney to Hilo (Hawaii) | 7,272.59 mi (11,704.10 km) |
| London Colney to Hilton Head Island (South Carolina) | 4,121.83 mi (6,633.45 km) |
| London Colney to Hinesville (Georgia) | 4,175.41 mi (6,719.68 km) |
| London Colney to Hinsdale (Illinois) | 3,948.92 mi (6,355.18 km) |
| London Colney to Hobart (Indiana) | 3,937.41 mi (6,336.64 km) |
| London Colney to Hobbs (New Mexico) | 4,977.01 mi (8,009.73 km) |
| London Colney to Hobe Sound (Florida) | 4,350.32 mi (7,001.16 km) |
| London Colney to Hoboken (New Jersey) | 3,448.93 mi (5,550.52 km) |
| London Colney to Hockessin (Delaware) | 3,558.45 mi (5,726.77 km) |
| London Colney to Hoffman Estates (Illinois) | 3,944.94 mi (6,348.77 km) |
| London Colney to Holbrook (New York) | 3,407.76 mi (5,484.26 km) |
