| Hemel Hempstead to Grottaferrata | 924.94 mi (1,488.55 km) |
| Hemel Hempstead to Grottaglie | 1,149.91 mi (1,850.61 km) |
| Hemel Hempstead to Grottammare | 900.70 mi (1,449.54 km) |
| Hemel Hempstead to Grugliasco | 590.46 mi (950.26 km) |
| Hemel Hempstead to Grumo Appula | 1,099.45 mi (1,769.39 km) |
| Hemel Hempstead to Grumo Nevano | 1,022.30 mi (1,645.24 km) |
| Hemel Hempstead to Gualdo Tadino | 851.53 mi (1,370.41 km) |
| Hemel Hempstead to Guardiagrele | 953.21 mi (1,534.04 km) |
| Hemel Hempstead to Guastalla | 694.81 mi (1,118.19 km) |
| Hemel Hempstead to Gubbio | 838.27 mi (1,349.06 km) |
| Hemel Hempstead to Guspini | 950.20 mi (1,529.20 km) |
| Hemel Hempstead to Gussago | 643.39 mi (1,035.44 km) |
| Hemel Hempstead to Iesi | 852.22 mi (1,371.52 km) |
| Hemel Hempstead to Iesolo | 735.19 mi (1,183.18 km) |
| Hemel Hempstead to Iglesias | 961.69 mi (1,547.70 km) |
