| Harrow to Grottaferrata | 913.15 mi (1,469.57 km) |
| Harrow to Grottaglie | 1,138.88 mi (1,832.85 km) |
| Harrow to Grottammare | 889.53 mi (1,431.57 km) |
| Harrow to Grugliasco | 578.26 mi (930.61 km) |
| Harrow to Grumo Appula | 1,088.38 mi (1,751.58 km) |
| Harrow to Grumo Nevano | 1,010.66 mi (1,626.50 km) |
| Harrow to Gualdo Tadino | 840.16 mi (1,352.11 km) |
| Harrow to Guardiagrele | 941.88 mi (1,515.81 km) |
| Harrow to Guastalla | 683.45 mi (1,099.90 km) |
| Harrow to Gubbio | 826.88 mi (1,330.73 km) |
| Harrow to Guspini | 937.48 mi (1,508.72 km) |
| Harrow to Gussago | 632.17 mi (1,017.38 km) |
| Harrow to Iesi | 841.07 mi (1,353.58 km) |
| Harrow to Iesolo | 724.75 mi (1,166.37 km) |
| Harrow to Iglesias | 948.95 mi (1,527.19 km) |
