| Prospect Heights to Isny im Allgau | 4,473.52 mi (7,199.44 km) |
| Prospect Heights to Isselburg | 4,181.99 mi (6,730.27 km) |
| Prospect Heights to Issum | 4,191.16 mi (6,745.02 km) |
| Prospect Heights to Itzehoe | 4,212.40 mi (6,779.20 km) |
| Prospect Heights to Jena | 4,400.52 mi (7,081.95 km) |
| Prospect Heights to Jever | 4,169.53 mi (6,710.21 km) |
| Prospect Heights to Jork | 4,232.71 mi (6,811.89 km) |
| Prospect Heights to Juchen | 4,210.08 mi (6,775.46 km) |
| Prospect Heights to Julich | 4,211.38 mi (6,777.57 km) |
| Prospect Heights to Juterbog | 4,409.82 mi (7,096.92 km) |
| Prospect Heights to Kaarst | 4,210.04 mi (6,775.40 km) |
| Prospect Heights to Kaiserslautern | 4,319.26 mi (6,951.18 km) |
| Prospect Heights to Kalkar | 4,179.09 mi (6,725.60 km) |
| Prospect Heights to Kall | 4,232.22 mi (6,811.10 km) |
| Prospect Heights to Kaltenkirchen | 4,230.78 mi (6,808.78 km) |
