| Watford to Piazza Armerina | 1,220.29 mi (1,963.87 km) |
| Watford to Piazzola sul Brenta | 696.94 mi (1,121.62 km) |
| Watford to Pietrasanta | 724.12 mi (1,165.35 km) |
| Watford to Pieve di Soligo | 695.85 mi (1,119.86 km) |
| Watford to Pinerolo | 586.64 mi (944.10 km) |
| Watford to Pioltello | 614.37 mi (988.74 km) |
| Watford to Piombino | 788.70 mi (1,269.29 km) |
| Watford to Piombino Dese | 701.98 mi (1,129.73 km) |
| Watford to Piossasco | 584.46 mi (940.59 km) |
| Watford to Piove di Sacco | 717.57 mi (1,154.81 km) |
| Watford to Pisa | 742.10 mi (1,194.29 km) |
| Watford to Pisticci | 1,120.74 mi (1,803.66 km) |
| Watford to Pistoia | 746.94 mi (1,202.09 km) |
| Watford to Pizzo | 1,197.49 mi (1,927.17 km) |
| Watford to Podenzano | 654.01 mi (1,052.53 km) |
