| Frosinone to Impruneta | 177.32 mi (285.37 km) |
| Frosinone to Induno Olona | 368.26 mi (592.66 km) |
| Frosinone to Inverigo | 350.46 mi (564.02 km) |
| Frosinone to Inveruno | 350.21 mi (563.61 km) |
| Frosinone to Inzago | 331.67 mi (533.77 km) |
| Frosinone to Iseo | 323.22 mi (520.17 km) |
| Frosinone to Isernia | 46.00 mi (74.04 km) |
| Frosinone to Isola Capo Rizzuto | 270.33 mi (435.05 km) |
| Frosinone to Isola del Liri | 11.93 mi (19.21 km) |
| Frosinone to Isola della Scala | 277.24 mi (446.17 km) |
| Frosinone to Isola Vicentina | 292.23 mi (470.29 km) |
| Frosinone to Ispica | 345.21 mi (555.56 km) |
| Frosinone to Istrana | 286.71 mi (461.41 km) |
| Frosinone to Itri | 25.98 mi (41.81 km) |
| Frosinone to Ittiri | 258.98 mi (416.78 km) |
