| Harrow Weald to Imola | 747.81 mi (1,203.48 km) |
| Harrow Weald to Impruneta | 766.72 mi (1,233.92 km) |
| Harrow Weald to Induno Olona | 576.10 mi (927.14 km) |
| Harrow Weald to Inverigo | 594.64 mi (956.97 km) |
| Harrow Weald to Inveruno | 593.67 mi (955.42 km) |
| Harrow Weald to Inzago | 613.53 mi (987.37 km) |
| Harrow Weald to Iseo | 626.60 mi (1,008.42 km) |
| Harrow Weald to Isernia | 974.56 mi (1,568.41 km) |
| Harrow Weald to Isola Capo Rizzuto | 1,211.23 mi (1,949.29 km) |
| Harrow Weald to Isola del Liri | 948.59 mi (1,526.61 km) |
| Harrow Weald to Isola della Scala | 678.55 mi (1,092.02 km) |
| Harrow Weald to Isola Vicentina | 676.96 mi (1,089.47 km) |
| Harrow Weald to Ispica | 1,266.74 mi (2,038.63 km) |
| Harrow Weald to Istrana | 698.37 mi (1,123.91 km) |
| Harrow Weald to Itri | 968.75 mi (1,559.06 km) |
