| Horley to Imola | 724.30 mi (1,165.65 km) |
| Horley to Impruneta | 741.98 mi (1,194.11 km) |
| Horley to Induno Olona | 551.75 mi (887.95 km) |
| Horley to Inverigo | 570.53 mi (918.19 km) |
| Horley to Inveruno | 568.84 mi (915.45 km) |
| Horley to Inzago | 589.41 mi (948.56 km) |
| Horley to Iseo | 603.30 mi (970.91 km) |
| Horley to Isernia | 950.28 mi (1,529.33 km) |
| Horley to Isola Capo Rizzuto | 1,186.95 mi (1,910.21 km) |
| Horley to Isola del Liri | 923.87 mi (1,486.82 km) |
| Horley to Isola della Scala | 655.64 mi (1,055.15 km) |
| Horley to Isola Vicentina | 655.09 mi (1,054.26 km) |
| Horley to Ispica | 1,239.91 mi (1,995.45 km) |
| Horley to Istrana | 677.23 mi (1,089.89 km) |
| Horley to Itri | 943.67 mi (1,518.69 km) |
