| Castelldefels to Idar-Oberstein | 636.90 mi (1,025.00 km) |
| Castelldefels to Idstein | 687.72 mi (1,106.77 km) |
| Castelldefels to Illertissen | 622.14 mi (1,001.23 km) |
| Castelldefels to Illingen | 610.98 mi (983.28 km) |
| Castelldefels to Ilmenau | 777.55 mi (1,251.34 km) |
| Castelldefels to Ilsede | 851.40 mi (1,370.20 km) |
| Castelldefels to Ilsenburg | 838.91 mi (1,350.09 km) |
| Castelldefels to Ilsfeld | 642.57 mi (1,034.12 km) |
| Castelldefels to Ilvesheim | 649.59 mi (1,045.41 km) |
| Castelldefels to Immenstadt im Allgau | 594.32 mi (956.47 km) |
| Castelldefels to Ingelheim | 668.18 mi (1,075.33 km) |
| Castelldefels to Ingolstadt | 691.95 mi (1,113.58 km) |
| Castelldefels to Iserlohn | 748.42 mi (1,204.47 km) |
| Castelldefels to Isernhagen-Sud | 854.71 mi (1,375.52 km) |
| Castelldefels to Ismaning | 674.77 mi (1,085.94 km) |
