| Harpenden to Gaeta | 983.81 mi (1,583.29 km) |
| Harpenden to Gaggiano | 615.67 mi (990.82 km) |
| Harpenden to Galatina | 1,192.99 mi (1,919.93 km) |
| Harpenden to Galatone | 1,190.37 mi (1,915.71 km) |
| Harpenden to Galbiate | 606.60 mi (976.23 km) |
| Harpenden to Gallarate | 594.36 mi (956.54 km) |
| Harpenden to Galliate | 601.03 mi (967.26 km) |
| Harpenden to Gallipoli | 1,192.67 mi (1,919.42 km) |
| Harpenden to Gambettola | 790.13 mi (1,271.59 km) |
| Harpenden to Gambolo | 618.07 mi (994.69 km) |
| Harpenden to Garbagnate Milanese | 608.17 mi (978.75 km) |
| Harpenden to Gardone Val Trompia | 639.18 mi (1,028.66 km) |
| Harpenden to Garlasco | 622.81 mi (1,002.31 km) |
| Harpenden to Gassino Torinese | 594.21 mi (956.30 km) |
| Harpenden to Gatteo | 792.67 mi (1,275.67 km) |
