| Harrow to Imola | 747.21 mi (1,202.52 km) |
| Harrow to Impruneta | 766.04 mi (1,232.81 km) |
| Harrow to Induno Olona | 575.44 mi (926.08 km) |
| Harrow to Inverigo | 593.99 mi (955.94 km) |
| Harrow to Inveruno | 592.97 mi (954.30 km) |
| Harrow to Inzago | 612.88 mi (986.34 km) |
| Harrow to Iseo | 626.01 mi (1,007.47 km) |
| Harrow to Isernia | 973.91 mi (1,567.36 km) |
| Harrow to Isola Capo Rizzuto | 1,210.59 mi (1,948.25 km) |
| Harrow to Isola del Liri | 947.91 mi (1,525.52 km) |
| Harrow to Isola della Scala | 677.99 mi (1,091.11 km) |
| Harrow to Isola Vicentina | 676.47 mi (1,088.67 km) |
| Harrow to Ispica | 1,265.91 mi (2,037.28 km) |
| Harrow to Istrana | 697.92 mi (1,123.19 km) |
| Harrow to Itri | 968.05 mi (1,557.92 km) |
