| Harpenden to Potenza Picena | 871.75 mi (1,402.94 km) |
| Harpenden to Pozzallo | 1,279.76 mi (2,059.57 km) |
| Harpenden to Pozzuoli | 1,022.98 mi (1,646.33 km) |
| Harpenden to Prato | 761.52 mi (1,225.54 km) |
| Harpenden to Preganziol | 715.19 mi (1,150.99 km) |
| Harpenden to Priolo Gargallo | 1,263.63 mi (2,033.61 km) |
| Harpenden to Priverno | 958.03 mi (1,541.80 km) |
| Harpenden to Pulsano | 1,153.39 mi (1,856.20 km) |
| Harpenden to Putignano | 1,121.08 mi (1,804.20 km) |
| Harpenden to Qualiano | 1,018.72 mi (1,639.47 km) |
| Harpenden to Quarrata | 759.68 mi (1,222.58 km) |
| Harpenden to Quartu Sant'Elena | 982.00 mi (1,580.37 km) |
| Harpenden to Quartucciu | 981.10 mi (1,578.93 km) |
| Harpenden to Quattro Castella | 701.74 mi (1,129.35 km) |
| Harpenden to Quinto di Treviso | 710.49 mi (1,143.43 km) |
