| Didcot to Imola | 779.16 mi (1,253.93 km) |
| Didcot to Impruneta | 796.57 mi (1,281.96 km) |
| Didcot to Induno Olona | 606.47 mi (976.02 km) |
| Didcot to Inverigo | 625.31 mi (1,006.34 km) |
| Didcot to Inveruno | 623.42 mi (1,003.30 km) |
| Didcot to Inzago | 644.18 mi (1,036.71 km) |
| Didcot to Iseo | 658.18 mi (1,059.24 km) |
| Didcot to Isernia | 1,004.98 mi (1,617.36 km) |
| Didcot to Isola Capo Rizzuto | 1,241.64 mi (1,998.22 km) |
| Didcot to Isola del Liri | 978.44 mi (1,574.65 km) |
| Didcot to Isola della Scala | 710.54 mi (1,143.51 km) |
| Didcot to Isola Vicentina | 709.96 mi (1,142.57 km) |
| Didcot to Ispica | 1,293.23 mi (2,081.25 km) |
| Didcot to Istrana | 732.01 mi (1,178.05 km) |
| Didcot to Itri | 998.11 mi (1,606.30 km) |
