| Caerfyrddin to Idar-Oberstein | 528.52 mi (850.57 km) |
| Caerfyrddin to Idstein | 557.79 mi (897.67 km) |
| Caerfyrddin to Illertissen | 685.27 mi (1,102.83 km) |
| Caerfyrddin to Illingen | 526.36 mi (847.10 km) |
| Caerfyrddin to Ilmenau | 662.32 mi (1,065.91 km) |
| Caerfyrddin to Ilsede | 615.55 mi (990.63 km) |
| Caerfyrddin to Ilsenburg | 638.88 mi (1,028.18 km) |
| Caerfyrddin to Ilsfeld | 626.41 mi (1,008.10 km) |
| Caerfyrddin to Ilvesheim | 586.89 mi (944.50 km) |
| Caerfyrddin to Immenstadt im Allgau | 712.10 mi (1,146.01 km) |
| Caerfyrddin to Ingelheim | 553.66 mi (891.04 km) |
| Caerfyrddin to Ingolstadt | 725.04 mi (1,166.84 km) |
| Caerfyrddin to Iserlohn | 514.49 mi (828.00 km) |
| Caerfyrddin to Isernhagen-Sud | 601.30 mi (967.70 km) |
| Caerfyrddin to Ismaning | 750.63 mi (1,208.02 km) |
