| Rockville to Pittsburg (California) | 2,393.92 mi (3,852.64 km) |
| Rockville to Pittsburg (Kansas) | 957.37 mi (1,540.74 km) |
| Rockville to Pittsburgh (Pennsylvania) | 176.71 mi (284.39 km) |
| Rockville to Pittsfield (Massachusetts) | 309.28 mi (497.74 km) |
| Rockville to Placentia (California) | 2,270.28 mi (3,653.67 km) |
| Rockville to Placerville (California) | 2,323.49 mi (3,739.30 km) |
| Rockville to Plainfield (Illinois) | 608.17 mi (978.76 km) |
| Rockville to Plainfield (Indiana) | 493.73 mi (794.59 km) |
| Rockville to Plainfield (New Jersey) | 179.77 mi (289.31 km) |
| Rockville to Plainview (New York) | 227.67 mi (366.40 km) |
| Rockville to Plainview (Texas) | 1,398.72 mi (2,251.02 km) |
| Rockville to Plano (Illinois) | 624.32 mi (1,004.74 km) |
| Rockville to Plano (Texas) | 1,168.03 mi (1,879.77 km) |
| Rockville to Plant City (Florida) | 816.14 mi (1,313.44 km) |
| Rockville to Plantation (Florida) | 913.18 mi (1,469.62 km) |
