| Prospect Heights to Klaukkala | 4,408.12 mi (7,094.18 km) |
| Prospect Heights to Kokkola | 4,217.34 mi (6,787.15 km) |
| Prospect Heights to Kontiolahti | 4,423.91 mi (7,119.60 km) |
| Prospect Heights to Korsholm | 4,211.94 mi (6,778.47 km) |
| Prospect Heights to Kotka | 4,460.67 mi (7,178.76 km) |
| Prospect Heights to Kouvola | 4,436.23 mi (7,139.43 km) |
| Prospect Heights to Kuhmo | 4,352.67 mi (7,004.95 km) |
| Prospect Heights to Kuopio | 4,367.37 mi (7,028.60 km) |
| Prospect Heights to Kurikka | 4,250.80 mi (6,841.01 km) |
| Prospect Heights to Kuusamo | 4,260.50 mi (6,856.61 km) |
| Prospect Heights to Kuusankoski | 4,432.37 mi (7,133.20 km) |
| Prospect Heights to Lahti | 4,404.33 mi (7,088.08 km) |
| Prospect Heights to Laitila | 4,306.10 mi (6,930.00 km) |
| Prospect Heights to Lapinlahti | 4,338.84 mi (6,982.69 km) |
| Prospect Heights to Lappeenranta | 4,463.92 mi (7,183.98 km) |
