| Rhondda to Idar-Oberstein | 487.53 mi (784.60 km) |
| Rhondda to Idstein | 517.72 mi (833.20 km) |
| Rhondda to Illertissen | 643.74 mi (1,036.00 km) |
| Rhondda to Illingen | 484.99 mi (780.51 km) |
| Rhondda to Ilmenau | 623.69 mi (1,003.73 km) |
| Rhondda to Ilsede | 580.19 mi (933.73 km) |
| Rhondda to Ilsenburg | 602.59 mi (969.77 km) |
| Rhondda to Ilsfeld | 585.26 mi (941.88 km) |
| Rhondda to Ilvesheim | 545.96 mi (878.64 km) |
| Rhondda to Immenstadt im Allgau | 670.34 mi (1,078.81 km) |
| Rhondda to Ingelheim | 513.19 mi (825.90 km) |
| Rhondda to Ingolstadt | 684.15 mi (1,101.03 km) |
| Rhondda to Iserlohn | 476.57 mi (766.96 km) |
| Rhondda to Isernhagen-Sud | 566.38 mi (911.50 km) |
| Rhondda to Ismaning | 709.40 mi (1,141.67 km) |
