| Rockville to Parma (Ohio) | 288.84 mi (464.84 km) |
| Rockville to Parma Heights (Ohio) | 290.46 mi (467.46 km) |
| Rockville to Parole (Maryland) | 33.08 mi (53.23 km) |
| Rockville to Parsippany (New Jersey) | 190.30 mi (306.25 km) |
| Rockville to Pasadena (California) | 2,278.58 mi (3,667.02 km) |
| Rockville to Pasadena (Maryland) | 32.63 mi (52.51 km) |
| Rockville to Pasadena (Texas) | 1,211.94 mi (1,950.42 km) |
| Rockville to Pasadena Hills (Florida) | 800.70 mi (1,288.60 km) |
| Rockville to Pascagoula (Mississippi) | 882.64 mi (1,420.48 km) |
| Rockville to Pasco (Washington) | 2,162.53 mi (3,480.26 km) |
| Rockville to Passaic (New Jersey) | 201.76 mi (324.70 km) |
| Rockville to Pataskala (Ohio) | 303.03 mi (487.69 km) |
| Rockville to Patchogue (New York) | 247.96 mi (399.05 km) |
| Rockville to Paterson (New Jersey) | 202.72 mi (326.25 km) |
| Rockville to Patterson (California) | 2,365.49 mi (3,806.89 km) |
