| Highlands Ranch to Oak Harbor (Washington) | 1,063.00 mi (1,710.73 km) |
| Highlands Ranch to Oak Hills (Oregon) | 996.83 mi (1,604.24 km) |
| Highlands Ranch to Oak Lawn (Illinois) | 913.68 mi (1,470.42 km) |
| Highlands Ranch to Oak Park (California) | 846.44 mi (1,362.21 km) |
| Highlands Ranch to Oak Park (Illinois) | 912.63 mi (1,468.74 km) |
| Highlands Ranch to Oak Park (Michigan) | 1,150.60 mi (1,851.71 km) |
| Highlands Ranch to Oak Ridge (Florida) | 1,543.82 mi (2,484.54 km) |
| Highlands Ranch to Oak Ridge (New Jersey) | 1,601.26 mi (2,576.98 km) |
| Highlands Ranch to Oak Ridge (Tennessee) | 1,153.54 mi (1,856.44 km) |
| Highlands Ranch to Oakdale (California) | 864.27 mi (1,390.91 km) |
| Highlands Ranch to Oakdale (Minnesota) | 718.94 mi (1,157.02 km) |
| Highlands Ranch to Oakland (California) | 936.74 mi (1,507.54 km) |
| Highlands Ranch to Oakland (New Jersey) | 1,614.54 mi (2,598.36 km) |
| Highlands Ranch to Oakland Park (Florida) | 1,701.87 mi (2,738.90 km) |
| Highlands Ranch to Oakleaf Plantation (Florida) | 1,457.09 mi (2,344.96 km) |
