| Houghton le Spring to Imola | 931.53 mi (1,499.14 km) |
| Houghton le Spring to Impruneta | 957.68 mi (1,541.23 km) |
| Houghton le Spring to Induno Olona | 767.86 mi (1,235.76 km) |
| Houghton le Spring to Inverigo | 784.60 mi (1,262.69 km) |
| Houghton le Spring to Inveruno | 787.85 mi (1,267.92 km) |
| Houghton le Spring to Inzago | 803.20 mi (1,292.62 km) |
| Houghton le Spring to Iseo | 811.27 mi (1,305.61 km) |
| Houghton le Spring to Isernia | 1,160.41 mi (1,867.49 km) |
| Houghton le Spring to Isola Capo Rizzuto | 1,395.27 mi (2,245.47 km) |
| Houghton le Spring to Isola del Liri | 1,137.56 mi (1,830.72 km) |
| Houghton le Spring to Isola della Scala | 859.85 mi (1,383.80 km) |
| Houghton le Spring to Isola Vicentina | 852.11 mi (1,371.33 km) |
| Houghton le Spring to Ispica | 1,467.74 mi (2,362.10 km) |
| Houghton le Spring to Istrana | 868.58 mi (1,397.84 km) |
| Houghton le Spring to Itri | 1,159.84 mi (1,866.58 km) |
