| Llantrisant to Idar-Oberstein | 484.74 mi (780.12 km) |
| Llantrisant to Idstein | 515.39 mi (829.43 km) |
| Llantrisant to Illertissen | 640.59 mi (1,030.92 km) |
| Llantrisant to Illingen | 481.96 mi (775.64 km) |
| Llantrisant to Ilmenau | 621.86 mi (1,000.78 km) |
| Llantrisant to Ilsede | 579.28 mi (932.27 km) |
| Llantrisant to Ilsenburg | 601.44 mi (967.92 km) |
| Llantrisant to Ilsfeld | 582.38 mi (937.25 km) |
| Llantrisant to Ilvesheim | 543.21 mi (874.22 km) |
| Llantrisant to Immenstadt im Allgau | 666.94 mi (1,073.34 km) |
| Llantrisant to Ingelheim | 510.67 mi (821.85 km) |
| Llantrisant to Ingolstadt | 681.41 mi (1,096.62 km) |
| Llantrisant to Iserlohn | 474.99 mi (764.42 km) |
| Llantrisant to Isernhagen-Sud | 565.58 mi (910.21 km) |
| Llantrisant to Ismaning | 706.46 mi (1,136.94 km) |
