| Herndon to Oak Harbor (Washington) | 2,315.90 mi (3,727.08 km) |
| Herndon to Oak Hills (Oregon) | 2,336.17 mi (3,759.70 km) |
| Herndon to Oak Lawn (Illinois) | 577.44 mi (929.30 km) |
| Herndon to Oak Park (California) | 2,299.81 mi (3,701.18 km) |
| Herndon to Oak Park (Illinois) | 582.63 mi (937.65 km) |
| Herndon to Oak Park (Michigan) | 387.69 mi (623.93 km) |
| Herndon to Oak Ridge (Florida) | 761.13 mi (1,224.93 km) |
| Herndon to Oak Ridge (New Jersey) | 209.01 mi (336.37 km) |
| Herndon to Oak Ridge (Tennessee) | 431.81 mi (694.93 km) |
| Herndon to Oakdale (California) | 2,333.28 mi (3,755.06 km) |
| Herndon to Oakdale (Minnesota) | 899.59 mi (1,447.75 km) |
| Herndon to Oakland (California) | 2,404.65 mi (3,869.90 km) |
| Herndon to Oakland (New Jersey) | 219.08 mi (352.58 km) |
| Herndon to Oakland Park (Florida) | 898.25 mi (1,445.60 km) |
| Herndon to Oakleaf Plantation (Florida) | 658.39 mi (1,059.57 km) |
