| Hemel Hempstead to Jeffersonville (Indiana) | 4,018.72 mi (6,467.51 km) |
| Hemel Hempstead to Jenison (Michigan) | 3,810.82 mi (6,132.92 km) |
| Hemel Hempstead to Jenks (Oklahoma) | 4,530.58 mi (7,291.26 km) |
| Hemel Hempstead to Jennings (Missouri) | 4,177.50 mi (6,723.04 km) |
| Hemel Hempstead to Jensen Beach (Florida) | 4,338.47 mi (6,982.09 km) |
| Hemel Hempstead to Jericho (New York) | 3,419.83 mi (5,503.69 km) |
| Hemel Hempstead to Jerome (Idaho) | 4,813.68 mi (7,746.88 km) |
| Hemel Hempstead to Jersey City (New Jersey) | 3,444.29 mi (5,543.05 km) |
| Hemel Hempstead to Jessup (Maryland) | 3,623.94 mi (5,832.17 km) |
| Hemel Hempstead to Johns Creek (Georgia) | 4,165.98 mi (6,704.49 km) |
| Hemel Hempstead to Johnson City (New York) | 3,459.94 mi (5,568.23 km) |
| Hemel Hempstead to Johnson City (Tennessee) | 3,981.09 mi (6,406.95 km) |
| Hemel Hempstead to Johnston (Iowa) | 4,163.40 mi (6,700.34 km) |
| Hemel Hempstead to Johnstown (Colorado) | 4,630.18 mi (7,451.55 km) |
| Hemel Hempstead to Johnstown (Pennsylvania) | 3,657.46 mi (5,886.11 km) |
