| Watford to Penne | 923.48 mi (1,486.20 km) |
| Watford to Pergine Valsugana | 653.35 mi (1,051.47 km) |
| Watford to Perugia | 838.03 mi (1,348.67 km) |
| Watford to Pesaro | 814.38 mi (1,310.62 km) |
| Watford to Pescantina | 667.27 mi (1,073.87 km) |
| Watford to Pescara | 932.86 mi (1,501.30 km) |
| Watford to Peschiera del Garda | 663.22 mi (1,067.34 km) |
| Watford to Pescia | 741.33 mi (1,193.05 km) |
| Watford to Petilia Policastro | 1,196.43 mi (1,925.47 km) |
| Watford to Piacenza | 649.38 mi (1,045.07 km) |
| Watford to Pianella | 930.58 mi (1,497.63 km) |
| Watford to Pianezza | 580.25 mi (933.81 km) |
| Watford to Pianiga | 709.12 mi (1,141.21 km) |
| Watford to Piano di Sorrento | 1,036.48 mi (1,668.05 km) |
| Watford to Pianoro | 737.45 mi (1,186.81 km) |
