| Holyhead to Imola | 963.37 mi (1,550.40 km) |
| Holyhead to Impruneta | 981.45 mi (1,579.50 km) |
| Holyhead to Induno Olona | 791.17 mi (1,273.26 km) |
| Holyhead to Inverigo | 809.88 mi (1,303.37 km) |
| Holyhead to Inveruno | 808.31 mi (1,300.84 km) |
| Holyhead to Inzago | 828.76 mi (1,333.76 km) |
| Holyhead to Iseo | 842.22 mi (1,355.42 km) |
| Holyhead to Isernia | 1,189.70 mi (1,914.64 km) |
| Holyhead to Isola Capo Rizzuto | 1,426.38 mi (2,295.53 km) |
| Holyhead to Isola del Liri | 1,163.34 mi (1,872.21 km) |
| Holyhead to Isola della Scala | 894.26 mi (1,439.17 km) |
| Holyhead to Isola Vicentina | 892.60 mi (1,436.51 km) |
| Holyhead to Ispica | 1,477.56 mi (2,377.90 km) |
| Holyhead to Istrana | 913.73 mi (1,470.50 km) |
| Holyhead to Itri | 1,183.09 mi (1,904.00 km) |
