| Castelldefels to Isny im Allgau | 594.52 mi (956.78 km) |
| Castelldefels to Isselburg | 759.34 mi (1,222.03 km) |
| Castelldefels to Issum | 739.44 mi (1,190.02 km) |
| Castelldefels to Itzehoe | 940.37 mi (1,513.38 km) |
| Castelldefels to Jena | 808.60 mi (1,301.32 km) |
| Castelldefels to Jever | 892.68 mi (1,436.63 km) |
| Castelldefels to Jork | 918.88 mi (1,478.80 km) |
| Castelldefels to Juchen | 711.90 mi (1,145.69 km) |
| Castelldefels to Julich | 698.18 mi (1,123.61 km) |
| Castelldefels to Juterbog | 906.11 mi (1,458.25 km) |
| Castelldefels to Kaarst | 721.09 mi (1,160.49 km) |
| Castelldefels to Kaiserslautern | 629.86 mi (1,013.66 km) |
| Castelldefels to Kalkar | 750.87 mi (1,208.41 km) |
| Castelldefels to Kall | 676.81 mi (1,089.22 km) |
| Castelldefels to Kaltenkirchen | 942.84 mi (1,517.36 km) |
