| Penarth to Idar-Oberstein | 474.65 mi (763.87 km) |
| Penarth to Idstein | 505.88 mi (814.14 km) |
| Penarth to Illertissen | 630.01 mi (1,013.91 km) |
| Penarth to Illingen | 471.56 mi (758.89 km) |
| Penarth to Ilmenau | 613.09 mi (986.68 km) |
| Penarth to Ilsede | 572.05 mi (920.62 km) |
| Penarth to Ilsenburg | 593.78 mi (955.59 km) |
| Penarth to Ilsfeld | 572.14 mi (920.77 km) |
| Penarth to Ilvesheim | 533.15 mi (858.02 km) |
| Penarth to Immenstadt im Allgau | 656.09 mi (1,055.88 km) |
| Penarth to Ingelheim | 500.92 mi (806.16 km) |
| Penarth to Ingolstadt | 671.34 mi (1,080.41 km) |
| Penarth to Iserlohn | 466.64 mi (750.99 km) |
| Penarth to Isernhagen-Sud | 558.53 mi (898.87 km) |
| Penarth to Ismaning | 696.14 mi (1,120.33 km) |
