| Rockville to Robbinsdale (Minnesota) | 923.71 mi (1,486.57 km) |
| Rockville to Robertsville (New Jersey) | 175.09 mi (281.79 km) |
| Rockville to Robinson (Texas) | 1,240.01 mi (1,995.61 km) |
| Rockville to Robstown (Texas) | 1,411.49 mi (2,271.57 km) |
| Rockville to Rochester (Michigan) | 398.63 mi (641.54 km) |
| Rockville to Rochester (Minnesota) | 860.77 mi (1,385.28 km) |
| Rockville to Rochester (New Hampshire) | 433.33 mi (697.38 km) |
| Rockville to Rochester (New York) | 283.23 mi (455.82 km) |
| Rockville to Rochester Hills (Michigan) | 399.22 mi (642.48 km) |
| Rockville to Rock Hill (South Carolina) | 356.93 mi (574.42 km) |
| Rockville to Rock Island (Illinois) | 725.94 mi (1,168.29 km) |
| Rockville to Rock Springs (Wyoming) | 1,687.85 mi (2,716.34 km) |
| Rockville to Rockford (Illinois) | 660.84 mi (1,063.51 km) |
| Rockville to Rockledge (Florida) | 771.42 mi (1,241.49 km) |
| Rockville to Rocklin (California) | 2,345.65 mi (3,774.95 km) |
