| Naperville to Isny im Allgau | 4,499.22 mi (7,240.80 km) |
| Naperville to Isselburg | 4,208.09 mi (6,772.26 km) |
| Naperville to Issum | 4,217.21 mi (6,786.94 km) |
| Naperville to Itzehoe | 4,238.92 mi (6,821.89 km) |
| Naperville to Jena | 4,426.78 mi (7,124.21 km) |
| Naperville to Jever | 4,195.94 mi (6,752.71 km) |
| Naperville to Jork | 4,259.20 mi (6,854.52 km) |
| Naperville to Juchen | 4,236.06 mi (6,817.28 km) |
| Naperville to Julich | 4,237.33 mi (6,819.33 km) |
| Naperville to Juterbog | 4,436.29 mi (7,139.52 km) |
| Naperville to Kaarst | 4,236.05 mi (6,817.26 km) |
| Naperville to Kaiserslautern | 4,345.07 mi (6,992.72 km) |
| Naperville to Kalkar | 4,205.16 mi (6,767.55 km) |
| Naperville to Kall | 4,258.12 mi (6,852.79 km) |
| Naperville to Kaltenkirchen | 4,257.32 mi (6,851.49 km) |
