| Castro Valley to Isny im Allgau | 5,840.54 mi (9,399.43 km) |
| Castro Valley to Isselburg | 5,516.58 mi (8,878.08 km) |
| Castro Valley to Issum | 5,531.23 mi (8,901.65 km) |
| Castro Valley to Itzehoe | 5,480.98 mi (8,820.79 km) |
| Castro Valley to Jena | 5,699.66 mi (9,172.71 km) |
| Castro Valley to Jever | 5,459.91 mi (8,786.88 km) |
| Castro Valley to Jork | 5,506.61 mi (8,862.03 km) |
| Castro Valley to Juchen | 5,556.88 mi (8,942.94 km) |
| Castro Valley to Julich | 5,562.59 mi (8,952.13 km) |
| Castro Valley to Juterbog | 5,675.66 mi (9,134.10 km) |
| Castro Valley to Kaarst | 5,553.79 mi (8,937.95 km) |
| Castro Valley to Kaiserslautern | 5,681.36 mi (9,143.27 km) |
| Castro Valley to Kalkar | 5,516.95 mi (8,878.68 km) |
| Castro Valley to Kall | 5,587.89 mi (8,992.83 km) |
| Castro Valley to Kaltenkirchen | 5,496.54 mi (8,845.83 km) |
