| Houston to Idar-Oberstein | 5,195.46 mi (8,361.28 km) |
| Houston to Idstein | 5,215.63 mi (8,393.75 km) |
| Houston to Illertissen | 5,355.89 mi (8,619.47 km) |
| Houston to Illingen | 5,196.38 mi (8,362.76 km) |
| Houston to Ilmenau | 5,300.00 mi (8,529.52 km) |
| Houston to Ilsede | 5,216.90 mi (8,395.80 km) |
| Houston to Ilsenburg | 5,249.23 mi (8,447.82 km) |
| Houston to Ilsfeld | 5,293.78 mi (8,519.51 km) |
| Houston to Ilvesheim | 5,252.52 mi (8,453.12 km) |
| Houston to Immenstadt im Allgau | 5,384.41 mi (8,665.37 km) |
| Houston to Ingelheim | 5,215.55 mi (8,393.62 km) |
| Houston to Ingolstadt | 5,388.60 mi (8,672.11 km) |
| Houston to Iserlohn | 5,153.42 mi (8,293.63 km) |
| Houston to Isernhagen-Sud | 5,199.19 mi (8,367.29 km) |
| Houston to Ismaning | 5,417.85 mi (8,719.19 km) |
