| Ferentino to Impruneta | 171.49 mi (275.99 km) |
| Ferentino to Induno Olona | 362.43 mi (583.28 km) |
| Ferentino to Inverigo | 344.69 mi (554.73 km) |
| Ferentino to Inveruno | 344.30 mi (554.10 km) |
| Ferentino to Inzago | 325.91 mi (524.50 km) |
| Ferentino to Iseo | 317.68 mi (511.25 km) |
| Ferentino to Isernia | 51.40 mi (82.73 km) |
| Ferentino to Isola Capo Rizzuto | 276.48 mi (444.95 km) |
| Ferentino to Isola del Liri | 16.66 mi (26.81 km) |
| Ferentino to Isola della Scala | 271.98 mi (437.72 km) |
| Ferentino to Isola Vicentina | 287.35 mi (462.44 km) |
| Ferentino to Ispica | 349.86 mi (563.05 km) |
| Ferentino to Istrana | 282.27 mi (454.28 km) |
| Ferentino to Itri | 31.29 mi (50.35 km) |
| Ferentino to Ittiri | 254.88 mi (410.20 km) |
