| Castro Valley to Glyka Nera | 6,773.87 mi (10,901.49 km) |
| Castro Valley to Grevena | 6,585.69 mi (10,598.64 km) |
| Castro Valley to Ialysos | 6,972.80 mi (11,221.64 km) |
| Castro Valley to Ilion | 6,767.68 mi (10,891.52 km) |
| Castro Valley to Ilioupoli | 6,775.07 mi (10,903.43 km) |
| Castro Valley to Ioannina | 6,596.77 mi (10,616.48 km) |
| Castro Valley to Irakleio | 6,969.69 mi (11,216.64 km) |
| Castro Valley to Irakleio | 6,768.28 mi (10,892.49 km) |
| Castro Valley to Kaisariani | 6,773.12 mi (10,900.28 km) |
| Castro Valley to Kalamaria | 6,592.42 mi (10,609.47 km) |
| Castro Valley to Kalamata | 6,788.86 mi (10,925.62 km) |
| Castro Valley to Kallithea | 6,772.82 mi (10,899.80 km) |
| Castro Valley to Kalymnos | 6,910.37 mi (11,121.16 km) |
| Castro Valley to Kalyvia Thorikou | 6,785.32 mi (10,919.92 km) |
| Castro Valley to Kamatero | 6,766.34 mi (10,889.37 km) |
