| Naperville to Idar-Oberstein | 4,317.89 mi (6,948.97 km) |
| Naperville to Idstein | 4,334.26 mi (6,975.32 km) |
| Naperville to Illertissen | 4,479.86 mi (7,209.64 km) |
| Naperville to Illingen | 4,320.76 mi (6,953.59 km) |
| Naperville to Ilmenau | 4,412.57 mi (7,101.35 km) |
| Naperville to Ilsede | 4,324.78 mi (6,960.05 km) |
| Naperville to Ilsenburg | 4,357.83 mi (7,013.26 km) |
| Naperville to Ilsfeld | 4,415.70 mi (7,106.38 km) |
| Naperville to Ilvesheim | 4,373.83 mi (7,039.00 km) |
| Naperville to Immenstadt im Allgau | 4,510.97 mi (7,259.70 km) |
| Naperville to Ingelheim | 4,335.58 mi (6,977.44 km) |
| Naperville to Ingolstadt | 4,507.82 mi (7,254.64 km) |
| Naperville to Iserlohn | 4,268.22 mi (6,869.03 km) |
| Naperville to Isernhagen-Sud | 4,306.91 mi (6,931.30 km) |
| Naperville to Ismaning | 4,538.81 mi (7,304.51 km) |
