| Harpenden to Piazza Armerina | 1,227.45 mi (1,975.39 km) |
| Harpenden to Piazzola sul Brenta | 701.50 mi (1,128.96 km) |
| Harpenden to Pietrasanta | 730.51 mi (1,175.65 km) |
| Harpenden to Pieve di Soligo | 699.95 mi (1,126.45 km) |
| Harpenden to Pinerolo | 594.08 mi (956.09 km) |
| Harpenden to Pioltello | 620.25 mi (998.19 km) |
| Harpenden to Piombino | 795.47 mi (1,280.19 km) |
| Harpenden to Piombino Dese | 706.38 mi (1,136.81 km) |
| Harpenden to Piossasco | 591.77 mi (952.35 km) |
| Harpenden to Piove di Sacco | 722.18 mi (1,162.23 km) |
| Harpenden to Pisa | 748.53 mi (1,204.64 km) |
| Harpenden to Pisticci | 1,126.13 mi (1,812.33 km) |
| Harpenden to Pistoia | 753.00 mi (1,211.83 km) |
| Harpenden to Pizzo | 1,203.62 mi (1,937.03 km) |
| Harpenden to Podenzano | 660.07 mi (1,062.29 km) |
