| Prospect Heights to Karis | 4,393.34 mi (7,070.40 km) |
| Prospect Heights to Karkkila | 4,387.51 mi (7,061.01 km) |
| Prospect Heights to Kauhajoki | 4,253.03 mi (6,844.59 km) |
| Prospect Heights to Kauhava | 4,246.93 mi (6,834.78 km) |
| Prospect Heights to Kauniainen | 4,415.09 mi (7,105.40 km) |
| Prospect Heights to Kemi | 4,170.14 mi (6,711.20 km) |
| Prospect Heights to Kemijarvi | 4,189.95 mi (6,743.07 km) |
| Prospect Heights to Kempele | 4,226.88 mi (6,802.51 km) |
| Prospect Heights to Kerava | 4,416.43 mi (7,107.56 km) |
| Prospect Heights to Keuruu | 4,323.93 mi (6,958.68 km) |
| Prospect Heights to Kiiminki | 4,223.31 mi (6,796.76 km) |
| Prospect Heights to Kirkkonummi | 4,411.25 mi (7,099.21 km) |
| Prospect Heights to Kitee | 4,462.11 mi (7,181.07 km) |
| Prospect Heights to Kiuruvesi | 4,308.16 mi (6,933.32 km) |
| Prospect Heights to Kivisto | 4,413.23 mi (7,102.42 km) |
