| Potomac to Parma (Ohio) | 289.90 mi (466.55 km) |
| Potomac to Parma Heights (Ohio) | 291.51 mi (469.14 km) |
| Potomac to Parole (Maryland) | 34.55 mi (55.61 km) |
| Potomac to Parsippany (New Jersey) | 195.04 mi (313.88 km) |
| Potomac to Pasadena (California) | 2,276.86 mi (3,664.26 km) |
| Potomac to Pasadena (Maryland) | 35.71 mi (57.47 km) |
| Potomac to Pasadena (Texas) | 1,207.90 mi (1,943.93 km) |
| Potomac to Pasadena Hills (Florida) | 795.48 mi (1,280.20 km) |
| Potomac to Pascagoula (Mississippi) | 877.98 mi (1,412.98 km) |
| Potomac to Pasco (Washington) | 2,162.85 mi (3,480.78 km) |
| Potomac to Passaic (New Jersey) | 206.39 mi (332.15 km) |
| Potomac to Pataskala (Ohio) | 302.20 mi (486.35 km) |
| Potomac to Patchogue (New York) | 252.14 mi (405.78 km) |
| Potomac to Paterson (New Jersey) | 207.40 mi (333.77 km) |
| Potomac to Patterson (California) | 2,364.40 mi (3,805.13 km) |
