| South Portland to Perth | 2,966.42 mi (4,773.99 km) |
| South Portland to Peterborough | 3,159.86 mi (5,085.30 km) |
| South Portland to Peterhead | 3,010.79 mi (4,845.40 km) |
| South Portland to Peterlee | 3,073.22 mi (4,945.87 km) |
| South Portland to Petersfield | 3,166.07 mi (5,095.30 km) |
| South Portland to Pinner | 3,175.13 mi (5,109.87 km) |
| South Portland to Pitsea | 3,211.89 mi (5,169.04 km) |
| South Portland to Plumstead | 3,196.93 mi (5,144.96 km) |
| South Portland to Plymouth | 3,047.01 mi (4,903.70 km) |
| South Portland to Plympton | 3,050.53 mi (4,909.35 km) |
| South Portland to Plymstock | 3,049.51 mi (4,907.72 km) |
| South Portland to Polegate | 3,218.78 mi (5,180.13 km) |
| South Portland to Ponders End | 3,187.86 mi (5,130.36 km) |
| South Portland to Pont-y-pwl | 3,064.74 mi (4,932.22 km) |
| South Portland to Pontardulais | 3,023.70 mi (4,866.17 km) |
