| Prospect Heights to Idar-Oberstein | 4,292.06 mi (6,907.41 km) |
| Prospect Heights to Idstein | 4,308.30 mi (6,933.54 km) |
| Prospect Heights to Illertissen | 4,454.08 mi (7,168.14 km) |
| Prospect Heights to Illingen | 4,295.00 mi (6,912.14 km) |
| Prospect Heights to Ilmenau | 4,386.39 mi (7,059.21 km) |
| Prospect Heights to Ilsede | 4,298.42 mi (6,917.64 km) |
| Prospect Heights to Ilsenburg | 4,331.50 mi (6,970.88 km) |
| Prospect Heights to Ilsfeld | 4,389.84 mi (7,064.77 km) |
| Prospect Heights to Ilvesheim | 4,347.96 mi (6,997.36 km) |
| Prospect Heights to Immenstadt im Allgau | 4,485.27 mi (7,218.35 km) |
| Prospect Heights to Ingelheim | 4,309.67 mi (6,935.74 km) |
| Prospect Heights to Ingolstadt | 4,481.87 mi (7,212.87 km) |
| Prospect Heights to Iserlohn | 4,242.12 mi (6,827.04 km) |
| Prospect Heights to Isernhagen-Sud | 4,280.55 mi (6,888.88 km) |
| Prospect Heights to Ismaning | 4,512.92 mi (7,262.84 km) |
