| Potomac to Petaluma (California) | 2,426.87 mi (3,905.67 km) |
| Potomac to Petersburg (Virginia) | 125.50 mi (201.98 km) |
| Potomac to Pflugerville (Texas) | 1,296.93 mi (2,087.21 km) |
| Potomac to Pharr (Texas) | 1,504.25 mi (2,420.85 km) |
| Potomac to Phelan (California) | 2,237.26 mi (3,600.53 km) |
| Potomac to Phenix City (Alabama) | 630.41 mi (1,014.54 km) |
| Potomac to Philadelphia (Pennsylvania) | 129.52 mi (208.44 km) |
| Potomac to Phillipsburg (New Jersey) | 157.44 mi (253.38 km) |
| Potomac to Phoenix (Arizona) | 1,966.85 mi (3,165.34 km) |
| Potomac to Phoenixville (Pennsylvania) | 118.14 mi (190.12 km) |
| Potomac to Picayune (Mississippi) | 917.65 mi (1,476.82 km) |
| Potomac to Pickerington (Ohio) | 303.38 mi (488.24 km) |
| Potomac to Pico Rivera (California) | 2,278.32 mi (3,666.61 km) |
| Potomac to Piedmont (California) | 2,414.15 mi (3,885.20 km) |
| Potomac to Pierre (South Dakota) | 1,244.44 mi (2,002.73 km) |
