| Port Huron to Grottaferrata | 4,564.52 mi (7,345.89 km) |
| Port Huron to Grottaglie | 4,812.38 mi (7,744.77 km) |
| Port Huron to Grottammare | 4,562.86 mi (7,343.22 km) |
| Port Huron to Grugliasco | 4,225.10 mi (6,799.64 km) |
| Port Huron to Grumo Appula | 4,761.52 mi (7,662.93 km) |
| Port Huron to Grumo Nevano | 4,666.09 mi (7,509.35 km) |
| Port Huron to Gualdo Tadino | 4,509.12 mi (7,256.73 km) |
| Port Huron to Guardiagrele | 4,610.24 mi (7,419.46 km) |
| Port Huron to Guastalla | 4,355.87 mi (7,010.09 km) |
| Port Huron to Gubbio | 4,495.57 mi (7,234.91 km) |
| Port Huron to Guspini | 4,487.62 mi (7,222.12 km) |
| Port Huron to Gussago | 4,308.34 mi (6,933.60 km) |
| Port Huron to Iesi | 4,515.48 mi (7,266.96 km) |
| Port Huron to Iesolo | 4,409.77 mi (7,096.83 km) |
| Port Huron to Iglesias | 4,492.14 mi (7,229.40 km) |
