| Gretna to Poggibonsi | 5,336.96 mi (8,589.00 km) |
| Gretna to Poggio a Caiano | 5,321.50 mi (8,564.13 km) |
| Gretna to Poggio Renatico | 5,307.47 mi (8,541.55 km) |
| Gretna to Poggiomarino | 5,580.64 mi (8,981.17 km) |
| Gretna to Poirino | 5,145.30 mi (8,280.56 km) |
| Gretna to Policoro | 5,696.71 mi (9,167.98 km) |
| Gretna to Polistena | 5,737.66 mi (9,233.87 km) |
| Gretna to Pomezia | 5,458.51 mi (8,784.62 km) |
| Gretna to Pomigliano d'Arco | 5,569.73 mi (8,963.61 km) |
| Gretna to Pompei | 5,580.23 mi (8,980.52 km) |
| Gretna to Ponsacco | 5,309.31 mi (8,544.51 km) |
| Gretna to Pontassieve | 5,339.03 mi (8,592.35 km) |
| Gretna to Ponte Buggianese | 5,306.79 mi (8,540.45 km) |
| Gretna to Ponte San Pietro | 5,195.66 mi (8,361.61 km) |
| Gretna to Pontecorvo | 5,517.56 mi (8,879.66 km) |
