| Hemel Hempstead to Hutchinson (Minnesota) | 4,033.49 mi (6,491.27 km) |
| Hemel Hempstead to Hutto (Texas) | 4,872.82 mi (7,842.05 km) |
| Hemel Hempstead to Hyattsville (Maryland) | 3,639.61 mi (5,857.39 km) |
| Hemel Hempstead to Hybla Valley (Virginia) | 3,654.42 mi (5,881.22 km) |
| Hemel Hempstead to Idaho Falls (Idaho) | 4,695.10 mi (7,556.03 km) |
| Hemel Hempstead to Idylwood (Virginia) | 3,653.05 mi (5,879.02 km) |
| Hemel Hempstead to Ilchester (Maryland) | 3,620.43 mi (5,826.52 km) |
| Hemel Hempstead to Immokalee (Florida) | 4,429.56 mi (7,128.69 km) |
| Hemel Hempstead to Imperial (California) | 5,400.19 mi (8,690.77 km) |
| Hemel Hempstead to Imperial Beach (California) | 5,466.59 mi (8,797.63 km) |
| Hemel Hempstead to Independence (Kentucky) | 3,944.32 mi (6,347.77 km) |
| Hemel Hempstead to Independence (Missouri) | 4,314.36 mi (6,943.29 km) |
| Hemel Hempstead to Indian Trail (North Carolina) | 3,971.04 mi (6,390.77 km) |
| Hemel Hempstead to Indiana (Pennsylvania) | 3,653.61 mi (5,879.92 km) |
| Hemel Hempstead to Indianapolis (Indiana) | 3,968.02 mi (6,385.90 km) |
