| Harrow to Poggibonsi | 774.27 mi (1,246.07 km) |
| Harrow to Poggio a Caiano | 753.08 mi (1,211.97 km) |
| Harrow to Poggio Renatico | 718.89 mi (1,156.94 km) |
| Harrow to Poggiomarino | 1,027.08 mi (1,652.92 km) |
| Harrow to Poirino | 594.23 mi (956.33 km) |
| Harrow to Policoro | 1,129.70 mi (1,818.08 km) |
| Harrow to Polistena | 1,208.04 mi (1,944.15 km) |
| Harrow to Pomezia | 914.36 mi (1,471.52 km) |
| Harrow to Pomigliano d'Arco | 1,015.89 mi (1,634.91 km) |
| Harrow to Pompei | 1,028.16 mi (1,654.66 km) |
| Harrow to Ponsacco | 749.87 mi (1,206.80 km) |
| Harrow to Pontassieve | 767.37 mi (1,234.96 km) |
| Harrow to Ponte Buggianese | 741.53 mi (1,193.38 km) |
| Harrow to Ponte San Pietro | 608.22 mi (978.83 km) |
| Harrow to Pontecorvo | 962.65 mi (1,549.24 km) |
