| South Portland to Pontefract | 3,094.17 mi (4,979.59 km) |
| South Portland to Ponteland | 3,052.04 mi (4,911.79 km) |
| South Portland to Pontneddfechan | 3,041.31 mi (4,894.52 km) |
| South Portland to Pontypridd | 3,054.49 mi (4,915.73 km) |
| South Portland to Poole | 3,129.42 mi (5,036.31 km) |
| South Portland to Port Glasgow | 2,925.80 mi (4,708.63 km) |
| South Portland to Port Talbot | 3,035.99 mi (4,885.95 km) |
| South Portland to Portchester | 3,162.24 mi (5,089.14 km) |
| South Portland to Porthcawl | 3,042.69 mi (4,896.74 km) |
| South Portland to Portishead | 3,080.69 mi (4,957.89 km) |
| South Portland to Portlethen | 3,004.80 mi (4,835.76 km) |
| South Portland to Portsmouth | 3,164.42 mi (5,092.64 km) |
| South Portland to Potters Bar | 3,181.14 mi (5,119.55 km) |
| South Portland to Poulton le Fylde | 3,025.11 mi (4,868.45 km) |
| South Portland to Poynton | 3,069.09 mi (4,939.22 km) |
