| Watford to Fisciano | 1,041.85 mi (1,676.69 km) |
| Watford to Fiuggi | 934.74 mi (1,504.33 km) |
| Watford to Fiume Veneto | 714.88 mi (1,150.48 km) |
| Watford to Fiumefreddo di Sicilia | 1,220.41 mi (1,964.05 km) |
| Watford to Fiumicino | 905.59 mi (1,457.40 km) |
| Watford to Flero | 643.36 mi (1,035.38 km) |
| Watford to Florence | 766.37 mi (1,233.36 km) |
| Watford to Floridia | 1,260.59 mi (2,028.73 km) |
| Watford to Foggia | 1,029.98 mi (1,657.59 km) |
| Watford to Foiano della Chiana | 812.08 mi (1,306.91 km) |
| Watford to Folignano | 895.00 mi (1,440.36 km) |
| Watford to Foligno | 856.78 mi (1,378.86 km) |
| Watford to Follonica | 796.81 mi (1,282.35 km) |
| Watford to Fondi | 965.57 mi (1,553.93 km) |
| Watford to Fontanafredda | 707.17 mi (1,138.08 km) |
