| Viterbo to Imola | 135.08 mi (217.40 km) |
| Viterbo to Impruneta | 97.44 mi (156.82 km) |
| Viterbo to Induno Olona | 287.20 mi (462.21 km) |
| Viterbo to Inverigo | 270.13 mi (434.74 km) |
| Viterbo to Inveruno | 268.29 mi (431.78 km) |
| Viterbo to Inzago | 251.55 mi (404.83 km) |
| Viterbo to Iseo | 245.92 mi (395.77 km) |
| Viterbo to Isernia | 123.27 mi (198.38 km) |
| Viterbo to Isola Capo Rizzuto | 354.18 mi (569.99 km) |
| Viterbo to Isola del Liri | 91.03 mi (146.49 km) |
| Viterbo to Isola della Scala | 204.35 mi (328.87 km) |
| Viterbo to Isola Vicentina | 224.48 mi (361.26 km) |
| Viterbo to Ispica | 416.77 mi (670.73 km) |
| Viterbo to Istrana | 225.57 mi (363.02 km) |
| Viterbo to Itri | 107.53 mi (173.05 km) |
