| South Portland to Grottaferrata | 4,025.95 mi (6,479.14 km) |
| South Portland to Grottaglie | 4,280.12 mi (6,888.18 km) |
| South Portland to Grottammare | 4,033.08 mi (6,490.61 km) |
| South Portland to Grugliasco | 3,691.02 mi (5,940.12 km) |
| South Portland to Grumo Appula | 4,229.56 mi (6,806.82 km) |
| South Portland to Grumo Nevano | 4,127.49 mi (6,642.55 km) |
| South Portland to Gualdo Tadino | 3,977.84 mi (6,401.72 km) |
| South Portland to Guardiagrele | 4,077.47 mi (6,562.06 km) |
| South Portland to Guastalla | 3,828.13 mi (6,160.78 km) |
| South Portland to Gubbio | 3,964.34 mi (6,379.99 km) |
| South Portland to Guspini | 3,929.69 mi (6,324.23 km) |
| South Portland to Gussago | 3,783.06 mi (6,088.24 km) |
| South Portland to Iesi | 3,986.79 mi (6,416.13 km) |
| South Portland to Iesolo | 3,890.18 mi (6,260.64 km) |
| South Portland to Iglesias | 3,933.11 mi (6,329.72 km) |
