| Watford to Potenza Picena | 866.61 mi (1,394.68 km) |
| Watford to Pozzallo | 1,272.60 mi (2,048.05 km) |
| Watford to Pozzuoli | 1,016.85 mi (1,636.46 km) |
| Watford to Prato | 755.52 mi (1,215.89 km) |
| Watford to Preganziol | 710.90 mi (1,144.08 km) |
| Watford to Priolo Gargallo | 1,256.69 mi (2,022.45 km) |
| Watford to Priverno | 951.78 mi (1,531.75 km) |
| Watford to Pulsano | 1,148.29 mi (1,847.99 km) |
| Watford to Putignano | 1,116.09 mi (1,796.17 km) |
| Watford to Qualiano | 1,012.64 mi (1,629.68 km) |
| Watford to Quarrata | 753.61 mi (1,212.81 km) |
| Watford to Quartu Sant'Elena | 973.42 mi (1,566.58 km) |
| Watford to Quartucciu | 972.52 mi (1,565.13 km) |
| Watford to Quattro Castella | 695.89 mi (1,119.92 km) |
| Watford to Quinto di Treviso | 706.21 mi (1,136.53 km) |
