| Potomac to Pontefract | 3,573.51 mi (5,751.00 km) |
| Potomac to Ponteland | 3,531.42 mi (5,683.26 km) |
| Potomac to Pontneddfechan | 3,519.54 mi (5,664.14 km) |
| Potomac to Pontypridd | 3,532.63 mi (5,685.22 km) |
| Potomac to Poole | 3,607.03 mi (5,804.96 km) |
| Potomac to Port Glasgow | 3,405.08 mi (5,479.94 km) |
| Potomac to Port Talbot | 3,514.05 mi (5,655.32 km) |
| Potomac to Portchester | 3,640.13 mi (5,858.22 km) |
| Potomac to Porthcawl | 3,520.68 mi (5,665.99 km) |
| Potomac to Portishead | 3,558.82 mi (5,727.37 km) |
| Potomac to Portlethen | 3,483.42 mi (5,606.02 km) |
| Potomac to Portsmouth | 3,642.28 mi (5,861.68 km) |
| Potomac to Potters Bar | 3,659.78 mi (5,889.84 km) |
| Potomac to Poulton le Fylde | 3,504.42 mi (5,639.82 km) |
| Potomac to Poynton | 3,548.30 mi (5,710.44 km) |
