| Hemel Hempstead to Dardenne Prairie (Missouri) | 4,193.78 mi (6,749.24 km) |
| Hemel Hempstead to Darien (Illinois) | 3,946.35 mi (6,351.04 km) |
| Hemel Hempstead to Davenport (Iowa) | 4,054.18 mi (6,524.56 km) |
| Hemel Hempstead to Davidson (North Carolina) | 3,958.65 mi (6,370.83 km) |
| Hemel Hempstead to Davie (Florida) | 4,399.18 mi (7,079.79 km) |
| Hemel Hempstead to Davis (California) | 5,266.22 mi (8,475.17 km) |
| Hemel Hempstead to Dayton (Nevada) | 5,161.15 mi (8,306.07 km) |
| Hemel Hempstead to Dayton (Ohio) | 3,891.83 mi (6,263.29 km) |
| Hemel Hempstead to Daytona Beach (Florida) | 4,276.38 mi (6,882.17 km) |
| Hemel Hempstead to De Pere (Wisconsin) | 3,825.96 mi (6,157.30 km) |
| Hemel Hempstead to De Witt (New York) | 3,425.85 mi (5,513.37 km) |
| Hemel Hempstead to Dearborn (Michigan) | 3,737.34 mi (6,014.67 km) |
| Hemel Hempstead to Dearborn Heights (Michigan) | 3,739.65 mi (6,018.38 km) |
| Hemel Hempstead to DeBary (Florida) | 4,301.68 mi (6,922.89 km) |
| Hemel Hempstead to Decatur (Alabama) | 4,251.85 mi (6,842.69 km) |
