| Harpenden to Pontedera | 758.64 mi (1,220.92 km) |
| Harpenden to Pontinia | 956.93 mi (1,540.03 km) |
| Harpenden to Porcari | 748.45 mi (1,204.51 km) |
| Harpenden to Porcia | 712.87 mi (1,147.26 km) |
| Harpenden to Pordenone | 714.84 mi (1,150.43 km) |
| Harpenden to Portici | 1,030.12 mi (1,657.81 km) |
| Harpenden to Porto Empedocle | 1,209.52 mi (1,946.53 km) |
| Harpenden to Porto Recanati | 870.10 mi (1,400.29 km) |
| Harpenden to Porto Sant'Elpidio | 881.37 mi (1,418.43 km) |
| Harpenden to Porto Tolle | 748.60 mi (1,204.76 km) |
| Harpenden to Porto Torres | 864.62 mi (1,391.47 km) |
| Harpenden to Portoferraio | 796.11 mi (1,281.21 km) |
| Harpenden to Portogruaro | 728.97 mi (1,173.16 km) |
| Harpenden to Portomaggiore | 742.81 mi (1,195.43 km) |
| Harpenden to Potenza | 1,087.71 mi (1,750.50 km) |
