| Hertford to Grottaferrata | 914.89 mi (1,472.37 km) |
| Hertford to Grottaglie | 1,138.10 mi (1,831.60 km) |
| Hertford to Grottammare | 889.19 mi (1,431.01 km) |
| Hertford to Grugliasco | 581.81 mi (936.33 km) |
| Hertford to Grumo Appula | 1,087.71 mi (1,750.51 km) |
| Hertford to Grumo Nevano | 1,011.82 mi (1,628.37 km) |
| Hertford to Gualdo Tadino | 840.45 mi (1,352.57 km) |
| Hertford to Guardiagrele | 942.01 mi (1,516.01 km) |
| Hertford to Guastalla | 683.73 mi (1,100.36 km) |
| Hertford to Gubbio | 827.23 mi (1,331.30 km) |
| Hertford to Guspini | 944.39 mi (1,519.84 km) |
| Hertford to Gussago | 632.04 mi (1,017.17 km) |
| Hertford to Iesi | 840.68 mi (1,352.95 km) |
| Hertford to Iesolo | 722.44 mi (1,162.65 km) |
| Hertford to Iglesias | 956.07 mi (1,538.64 km) |
