| Harpenden to Penne | 928.98 mi (1,495.04 km) |
| Harpenden to Pergine Valsugana | 657.75 mi (1,058.55 km) |
| Harpenden to Perugia | 843.84 mi (1,358.03 km) |
| Harpenden to Pesaro | 819.52 mi (1,318.88 km) |
| Harpenden to Pescantina | 672.33 mi (1,082.01 km) |
| Harpenden to Pescara | 938.22 mi (1,509.92 km) |
| Harpenden to Peschiera del Garda | 668.40 mi (1,075.68 km) |
| Harpenden to Pescia | 747.51 mi (1,203.01 km) |
| Harpenden to Petilia Policastro | 1,202.21 mi (1,934.77 km) |
| Harpenden to Piacenza | 655.37 mi (1,054.71 km) |
| Harpenden to Pianella | 936.04 mi (1,506.41 km) |
| Harpenden to Pianezza | 587.44 mi (945.39 km) |
| Harpenden to Pianiga | 713.62 mi (1,148.46 km) |
| Harpenden to Piano di Sorrento | 1,042.57 mi (1,677.86 km) |
| Harpenden to Pianoro | 743.03 mi (1,195.79 km) |
