| Hemel Hempstead to Oak Harbor (Washington) | 4,730.38 mi (7,612.81 km) |
| Hemel Hempstead to Oak Hills (Oregon) | 4,893.82 mi (7,875.85 km) |
| Hemel Hempstead to Oak Lawn (Illinois) | 3,939.08 mi (6,339.33 km) |
| Hemel Hempstead to Oak Park (California) | 5,427.35 mi (8,734.47 km) |
| Hemel Hempstead to Oak Park (Illinois) | 3,932.40 mi (6,328.59 km) |
| Hemel Hempstead to Oak Park (Michigan) | 3,729.31 mi (6,001.74 km) |
| Hemel Hempstead to Oak Ridge (Florida) | 4,326.02 mi (6,962.06 km) |
| Hemel Hempstead to Oak Ridge (New Jersey) | 3,448.06 mi (5,549.11 km) |
| Hemel Hempstead to Oak Ridge (Tennessee) | 4,076.15 mi (6,559.94 km) |
| Hemel Hempstead to Oakdale (California) | 5,285.66 mi (8,506.45 km) |
| Hemel Hempstead to Oakdale (Minnesota) | 3,978.29 mi (6,402.44 km) |
| Hemel Hempstead to Oakland (California) | 5,324.75 mi (8,569.36 km) |
| Hemel Hempstead to Oakland (New Jersey) | 3,437.70 mi (5,532.45 km) |
| Hemel Hempstead to Oakland Park (Florida) | 4,388.50 mi (7,062.60 km) |
| Hemel Hempstead to Oakleaf Plantation (Florida) | 4,258.80 mi (6,853.87 km) |
