| Castaic to Isny im Allgau | 5,933.18 mi (9,548.53 km) |
| Castaic to Isselburg | 5,613.42 mi (9,033.93 km) |
| Castaic to Issum | 5,627.02 mi (9,055.82 km) |
| Castaic to Itzehoe | 5,591.23 mi (8,998.22 km) |
| Castaic to Jena | 5,805.77 mi (9,343.48 km) |
| Castaic to Jever | 5,565.52 mi (8,956.83 km) |
| Castaic to Jork | 5,616.04 mi (9,038.15 km) |
| Castaic to Juchen | 5,651.45 mi (9,095.13 km) |
| Castaic to Julich | 5,656.25 mi (9,102.85 km) |
| Castaic to Juterbog | 5,788.39 mi (9,315.52 km) |
| Castaic to Kaarst | 5,648.99 mi (9,091.18 km) |
| Castaic to Kaiserslautern | 5,773.69 mi (9,291.86 km) |
| Castaic to Kalkar | 5,613.09 mi (9,033.40 km) |
| Castaic to Kall | 5,680.79 mi (9,142.35 km) |
| Castaic to Kaltenkirchen | 5,607.52 mi (9,024.43 km) |
