| River Grove to Perth | 3,687.55 mi (5,934.53 km) |
| River Grove to Peterborough | 3,915.45 mi (6,301.30 km) |
| River Grove to Peterhead | 3,714.96 mi (5,978.65 km) |
| River Grove to Peterlee | 3,808.45 mi (6,129.11 km) |
| River Grove to Petersfield | 3,938.54 mi (6,338.47 km) |
| River Grove to Pinner | 3,940.62 mi (6,341.82 km) |
| River Grove to Pitsea | 3,975.30 mi (6,397.63 km) |
| River Grove to Plumstead | 3,962.17 mi (6,376.50 km) |
| River Grove to Plymouth | 3,833.20 mi (6,168.94 km) |
| River Grove to Plympton | 3,836.36 mi (6,174.03 km) |
| River Grove to Plymstock | 3,835.71 mi (6,172.97 km) |
| River Grove to Polegate | 3,989.89 mi (6,421.11 km) |
| River Grove to Ponders End | 3,951.97 mi (6,360.07 km) |
| River Grove to Pont-y-pwl | 3,835.74 mi (6,173.03 km) |
| River Grove to Pontardulais | 3,796.99 mi (6,110.66 km) |
