| Hackettstown to Karis | 4,094.22 mi (6,589.01 km) |
| Hackettstown to Karkkila | 4,094.95 mi (6,590.19 km) |
| Hackettstown to Kauhajoki | 3,973.46 mi (6,394.67 km) |
| Hackettstown to Kauhava | 3,977.25 mi (6,400.77 km) |
| Hackettstown to Kauniainen | 4,121.15 mi (6,632.36 km) |
| Hackettstown to Kemi | 3,933.59 mi (6,330.50 km) |
| Hackettstown to Kemijarvi | 3,972.49 mi (6,393.11 km) |
| Hackettstown to Kempele | 3,984.15 mi (6,411.87 km) |
| Hackettstown to Kerava | 4,125.61 mi (6,639.52 km) |
| Hackettstown to Keuruu | 4,050.64 mi (6,518.87 km) |
| Hackettstown to Kiiminki | 3,983.76 mi (6,411.25 km) |
| Hackettstown to Kirkkonummi | 4,115.20 mi (6,622.78 km) |
| Hackettstown to Kitee | 4,205.94 mi (6,768.81 km) |
| Hackettstown to Kiuruvesi | 4,055.55 mi (6,526.78 km) |
| Hackettstown to Kivisto | 4,120.75 mi (6,631.71 km) |
