| South Houston to Idar-Oberstein | 5,195.73 mi (8,361.72 km) |
| South Houston to Idstein | 5,216.08 mi (8,394.47 km) |
| South Houston to Illertissen | 5,356.07 mi (8,619.76 km) |
| South Houston to Illingen | 5,196.56 mi (8,363.06 km) |
| South Houston to Ilmenau | 5,300.73 mi (8,530.70 km) |
| South Houston to Ilsede | 5,217.90 mi (8,397.40 km) |
| South Houston to Ilsenburg | 5,250.18 mi (8,449.35 km) |
| South Houston to Ilsfeld | 5,294.06 mi (8,519.97 km) |
| South Houston to Ilvesheim | 5,252.84 mi (8,453.63 km) |
| South Houston to Immenstadt im Allgau | 5,384.48 mi (8,665.48 km) |
| South Houston to Ingelheim | 5,215.93 mi (8,394.23 km) |
| South Houston to Ingolstadt | 5,388.99 mi (8,672.75 km) |
| South Houston to Iserlohn | 5,154.06 mi (8,294.66 km) |
| South Houston to Isernhagen-Sud | 5,200.20 mi (8,368.91 km) |
| South Houston to Ismaning | 5,418.17 mi (8,719.69 km) |
