| Grimstad to Imola | 975.51 mi (1,569.94 km) |
| Grimstad to Impruneta | 1,019.08 mi (1,640.05 km) |
| Grimstad to Induno Olona | 863.07 mi (1,388.97 km) |
| Grimstad to Inverigo | 871.47 mi (1,402.49 km) |
| Grimstad to Inveruno | 886.10 mi (1,426.05 km) |
| Grimstad to Inzago | 885.68 mi (1,425.37 km) |
| Grimstad to Iseo | 878.38 mi (1,413.62 km) |
| Grimstad to Isernia | 1,182.36 mi (1,902.82 km) |
| Grimstad to Isola Capo Rizzuto | 1,391.66 mi (2,239.65 km) |
| Grimstad to Isola del Liri | 1,171.43 mi (1,885.23 km) |
| Grimstad to Isola della Scala | 908.88 mi (1,462.69 km) |
| Grimstad to Isola Vicentina | 886.15 mi (1,426.12 km) |
| Grimstad to Ispica | 1,516.63 mi (2,440.78 km) |
| Grimstad to Istrana | 886.85 mi (1,427.24 km) |
| Grimstad to Itri | 1,198.15 mi (1,928.24 km) |
