| Holyhead to Grottaferrata | 1,127.88 mi (1,815.15 km) |
| Holyhead to Grottaglie | 1,355.15 mi (2,180.91 km) |
| Holyhead to Grottammare | 1,105.77 mi (1,779.57 km) |
| Holyhead to Grugliasco | 790.54 mi (1,272.26 km) |
| Holyhead to Grumo Appula | 1,304.65 mi (2,099.63 km) |
| Holyhead to Grumo Nevano | 1,226.00 mi (1,973.05 km) |
| Holyhead to Gualdo Tadino | 1,056.18 mi (1,699.76 km) |
| Holyhead to Guardiagrele | 1,157.96 mi (1,863.56 km) |
| Holyhead to Guastalla | 899.51 mi (1,447.62 km) |
| Holyhead to Gubbio | 1,042.87 mi (1,678.34 km) |
| Holyhead to Guspini | 1,138.39 mi (1,832.07 km) |
| Holyhead to Gussago | 848.38 mi (1,365.34 km) |
| Holyhead to Iesi | 1,057.32 mi (1,701.59 km) |
| Holyhead to Iesolo | 940.39 mi (1,513.41 km) |
| Holyhead to Iglesias | 1,148.97 mi (1,849.08 km) |
