| Rockville to Oak Grove (South Carolina) | 416.47 mi (670.24 km) |
| Rockville to Oak Harbor (Washington) | 2,322.48 mi (3,737.68 km) |
| Rockville to Oak Hills (Oregon) | 2,343.86 mi (3,772.08 km) |
| Rockville to Oak Lawn (Illinois) | 586.03 mi (943.12 km) |
| Rockville to Oak Park (California) | 2,311.52 mi (3,720.04 km) |
| Rockville to Oak Park (Illinois) | 590.99 mi (951.11 km) |
| Rockville to Oak Park (Michigan) | 392.31 mi (631.36 km) |
| Rockville to Oak Ridge (Florida) | 772.64 mi (1,243.44 km) |
| Rockville to Oak Ridge (New Jersey) | 194.64 mi (313.25 km) |
| Rockville to Oak Ridge (Tennessee) | 446.43 mi (718.45 km) |
| Rockville to Oakdale (California) | 2,343.82 mi (3,772.01 km) |
| Rockville to Oakdale (Minnesota) | 905.92 mi (1,457.94 km) |
| Rockville to Oakland (California) | 2,415.07 mi (3,886.69 km) |
| Rockville to Oakland (New Jersey) | 204.60 mi (329.27 km) |
| Rockville to Oakland Park (Florida) | 908.42 mi (1,461.95 km) |
