| Grefrath to Impruneta | 575.95 mi (926.90 km) |
| Grefrath to Induno Olona | 395.75 mi (636.89 km) |
| Grefrath to Inverigo | 408.79 mi (657.89 km) |
| Grefrath to Inveruno | 418.16 mi (672.97 km) |
| Grefrath to Inzago | 425.94 mi (685.48 km) |
| Grefrath to Iseo | 427.40 mi (687.83 km) |
| Grefrath to Isernia | 769.41 mi (1,238.24 km) |
| Grefrath to Isola Capo Rizzuto | 1,000.65 mi (1,610.39 km) |
| Grefrath to Isola del Liri | 749.78 mi (1,206.65 km) |
| Grefrath to Isola della Scala | 470.71 mi (757.54 km) |
| Grefrath to Isola Vicentina | 458.01 mi (737.10 km) |
| Grefrath to Ispica | 1,089.86 mi (1,753.96 km) |
| Grefrath to Istrana | 470.90 mi (757.84 km) |
| Grefrath to Itri | 773.90 mi (1,245.47 km) |
| Grefrath to Ittiri | 749.37 mi (1,206.00 km) |
