| Portimao to Grottaferrata | 1,172.72 mi (1,887.31 km) |
| Portimao to Grottaglie | 1,412.07 mi (2,272.52 km) |
| Portimao to Grottammare | 1,247.32 mi (2,007.37 km) |
| Portimao to Grugliasco | 999.30 mi (1,608.22 km) |
| Portimao to Grumo Appula | 1,374.93 mi (2,212.73 km) |
| Portimao to Grumo Nevano | 1,247.90 mi (2,008.30 km) |
| Portimao to Gualdo Tadino | 1,197.58 mi (1,927.32 km) |
| Portimao to Guardiagrele | 1,255.46 mi (2,020.47 km) |
| Portimao to Guastalla | 1,132.22 mi (1,822.14 km) |
| Portimao to Gubbio | 1,188.90 mi (1,913.35 km) |
| Portimao to Guspini | 943.74 mi (1,518.80 km) |
| Portimao to Gussago | 1,127.66 mi (1,814.80 km) |
| Portimao to Iesi | 1,224.53 mi (1,970.69 km) |
| Portimao to Iesolo | 1,237.36 mi (1,991.33 km) |
| Portimao to Iglesias | 937.30 mi (1,508.44 km) |
