| Niagara Falls to Imola | 4,277.18 mi (6,883.45 km) |
| Niagara Falls to Impruneta | 4,284.07 mi (6,894.54 km) |
| Niagara Falls to Induno Olona | 4,103.00 mi (6,603.14 km) |
| Niagara Falls to Inverigo | 4,122.93 mi (6,635.21 km) |
| Niagara Falls to Inveruno | 4,115.92 mi (6,623.93 km) |
| Niagara Falls to Inzago | 4,141.21 mi (6,664.63 km) |
| Niagara Falls to Iseo | 4,159.77 mi (6,694.50 km) |
| Niagara Falls to Isernia | 4,491.14 mi (7,227.79 km) |
| Niagara Falls to Isola Capo Rizzuto | 4,721.78 mi (7,598.97 km) |
| Niagara Falls to Isola del Liri | 4,460.24 mi (7,178.07 km) |
| Niagara Falls to Isola della Scala | 4,213.32 mi (6,780.68 km) |
| Niagara Falls to Isola Vicentina | 4,217.25 mi (6,787.00 km) |
| Niagara Falls to Ispica | 4,721.62 mi (7,598.72 km) |
| Niagara Falls to Istrana | 4,241.49 mi (6,826.02 km) |
| Niagara Falls to Itri | 4,474.75 mi (7,201.41 km) |
