| Watford to Grottaferrata | 918.05 mi (1,477.46 km) |
| Watford to Grottaglie | 1,143.45 mi (1,840.20 km) |
| Watford to Grottammare | 894.16 mi (1,439.01 km) |
| Watford to Grugliasco | 583.34 mi (938.79 km) |
| Watford to Grumo Appula | 1,092.96 mi (1,758.96 km) |
| Watford to Grumo Nevano | 1,015.50 mi (1,634.28 km) |
| Watford to Gualdo Tadino | 844.88 mi (1,359.70 km) |
| Watford to Guardiagrele | 946.58 mi (1,523.37 km) |
| Watford to Guastalla | 688.16 mi (1,107.48 km) |
| Watford to Gubbio | 831.60 mi (1,338.33 km) |
| Watford to Guspini | 942.80 mi (1,517.28 km) |
| Watford to Gussago | 636.82 mi (1,024.86 km) |
| Watford to Iesi | 845.69 mi (1,361.01 km) |
| Watford to Iesolo | 729.06 mi (1,173.31 km) |
| Watford to Iglesias | 954.28 mi (1,535.77 km) |
