| Potomac to Prescot | 3,519.48 mi (5,664.05 km) |
| Potomac to Prestatyn | 3,497.46 mi (5,628.62 km) |
| Potomac to Preston | 3,517.67 mi (5,661.14 km) |
| Potomac to Prestonpans | 3,469.96 mi (5,584.36 km) |
| Potomac to Prestwich | 3,538.24 mi (5,694.25 km) |
| Potomac to Prestwick | 3,414.45 mi (5,495.03 km) |
| Potomac to Prudhoe | 3,529.06 mi (5,679.47 km) |
| Potomac to Pudsey | 3,557.70 mi (5,725.56 km) |
| Potomac to Quedgeley | 3,571.70 mi (5,748.10 km) |
| Potomac to Queensbury | 3,551.08 mi (5,714.91 km) |
| Potomac to Queensferry | 3,453.03 mi (5,557.12 km) |
| Potomac to Radcliffe | 3,536.00 mi (5,690.64 km) |
| Potomac to Radstock | 3,575.68 mi (5,754.50 km) |
| Potomac to Rainham | 3,699.58 mi (5,953.90 km) |
| Potomac to Rainhill | 3,521.46 mi (5,667.23 km) |
