| Hereford to Oak Harbor (Washington) | 4,654.94 mi (7,491.40 km) |
| Hereford to Oak Hills (Oregon) | 4,816.73 mi (7,751.77 km) |
| Hereford to Oak Lawn (Illinois) | 3,844.01 mi (6,186.33 km) |
| Hereford to Oak Park (California) | 5,341.47 mi (8,596.26 km) |
| Hereford to Oak Park (Illinois) | 3,837.41 mi (6,175.71 km) |
| Hereford to Oak Park (Michigan) | 3,633.44 mi (5,847.45 km) |
| Hereford to Oak Ridge (Florida) | 4,228.00 mi (6,804.31 km) |
| Hereford to Oak Ridge (New Jersey) | 3,350.45 mi (5,392.02 km) |
| Hereford to Oak Ridge (Tennessee) | 3,978.84 mi (6,403.32 km) |
| Hereford to Oakdale (California) | 5,202.81 mi (8,373.12 km) |
| Hereford to Oakdale (Minnesota) | 3,886.22 mi (6,254.26 km) |
| Hereford to Oakland (California) | 5,242.78 mi (8,437.45 km) |
| Hereford to Oakland (New Jersey) | 3,340.07 mi (5,375.32 km) |
| Hereford to Oakland Park (Florida) | 4,290.67 mi (6,905.17 km) |
| Hereford to Oakleaf Plantation (Florida) | 4,160.76 mi (6,696.09 km) |
