| Romeoville to Idar-Oberstein | 4,320.93 mi (6,953.87 km) |
| Romeoville to Idstein | 4,337.43 mi (6,980.42 km) |
| Romeoville to Illertissen | 4,482.87 mi (7,214.48 km) |
| Romeoville to Illingen | 4,323.74 mi (6,958.39 km) |
| Romeoville to Ilmenau | 4,415.95 mi (7,106.79 km) |
| Romeoville to Ilsede | 4,328.32 mi (6,965.76 km) |
| Romeoville to Ilsenburg | 4,361.35 mi (7,018.92 km) |
| Romeoville to Ilsfeld | 4,418.77 mi (7,111.32 km) |
| Romeoville to Ilvesheim | 4,376.91 mi (7,043.96 km) |
| Romeoville to Immenstadt im Allgau | 4,513.91 mi (7,264.43 km) |
| Romeoville to Ingelheim | 4,338.70 mi (6,982.47 km) |
| Romeoville to Ingolstadt | 4,510.99 mi (7,259.73 km) |
| Romeoville to Iserlohn | 4,271.51 mi (6,874.33 km) |
| Romeoville to Isernhagen-Sud | 4,310.45 mi (6,937.01 km) |
| Romeoville to Ismaning | 4,541.92 mi (7,309.52 km) |
