| Castro Valley to Idar-Oberstein | 5,654.27 mi (9,099.67 km) |
| Castro Valley to Idstein | 5,652.70 mi (9,097.13 km) |
| Castro Valley to Illertissen | 5,812.45 mi (9,354.23 km) |
| Castro Valley to Illingen | 5,665.22 mi (9,117.29 km) |
| Castro Valley to Ilmenau | 5,696.44 mi (9,167.53 km) |
| Castro Valley to Ilsede | 5,589.38 mi (8,995.24 km) |
| Castro Valley to Ilsenburg | 5,624.22 mi (9,051.31 km) |
| Castro Valley to Ilsfeld | 5,743.53 mi (9,243.32 km) |
| Castro Valley to Ilvesheim | 5,701.69 mi (9,175.99 km) |
| Castro Valley to Immenstadt im Allgau | 5,852.39 mi (9,418.51 km) |
| Castro Valley to Ingelheim | 5,660.27 mi (9,109.32 km) |
| Castro Valley to Ingolstadt | 5,817.62 mi (9,362.56 km) |
| Castro Valley to Iserlohn | 5,572.96 mi (8,968.81 km) |
| Castro Valley to Isernhagen-Sud | 5,571.89 mi (8,967.09 km) |
| Castro Valley to Ismaning | 5,854.47 mi (9,421.86 km) |
