| Harpenden to Giovinazzo | 1,088.28 mi (1,751.41 km) |
| Harpenden to Giugliano in Campania | 1,019.34 mi (1,640.46 km) |
| Harpenden to Giulianova | 914.54 mi (1,471.82 km) |
| Harpenden to Giussano | 606.21 mi (975.61 km) |
| Harpenden to Goito | 676.97 mi (1,089.47 km) |
| Harpenden to Gonzaga | 697.03 mi (1,121.76 km) |
| Harpenden to Gorgonzola | 620.69 mi (998.91 km) |
| Harpenden to Gorizia | 751.91 mi (1,210.08 km) |
| Harpenden to Gragnano | 1,042.47 mi (1,677.69 km) |
| Harpenden to Grammichele | 1,245.08 mi (2,003.76 km) |
| Harpenden to Granarolo del l'Emilia | 738.44 mi (1,188.40 km) |
| Harpenden to Gravina in Puglia | 1,098.75 mi (1,768.26 km) |
| Harpenden to Grezzana | 675.90 mi (1,087.76 km) |
| Harpenden to Gricignano d'Aversa | 1,015.22 mi (1,633.84 km) |
| Harpenden to Grosseto | 822.12 mi (1,323.07 km) |
