| Slough to Imola | 752.42 mi (1,210.91 km) |
| Slough to Impruneta | 770.58 mi (1,240.12 km) |
| Slough to Induno Olona | 580.19 mi (933.72 km) |
| Slough to Inverigo | 598.88 mi (963.80 km) |
| Slough to Inveruno | 597.45 mi (961.50 km) |
| Slough to Inzago | 617.76 mi (994.19 km) |
| Slough to Iseo | 631.32 mi (1,016.02 km) |
| Slough to Isernia | 978.72 mi (1,575.10 km) |
| Slough to Isola Capo Rizzuto | 1,215.40 mi (1,956.00 km) |
| Slough to Isola del Liri | 952.47 mi (1,532.85 km) |
| Slough to Isola della Scala | 683.50 mi (1,099.99 km) |
| Slough to Isola Vicentina | 682.47 mi (1,098.33 km) |
| Slough to Ispica | 1,269.08 mi (2,042.38 km) |
| Slough to Istrana | 704.25 mi (1,133.38 km) |
| Slough to Itri | 972.39 mi (1,564.91 km) |
