| Harpenden to Karis | 1,081.04 mi (1,739.76 km) |
| Harpenden to Karkkila | 1,110.39 mi (1,787.00 km) |
| Harpenden to Kauhajoki | 1,108.52 mi (1,783.98 km) |
| Harpenden to Kauhava | 1,156.44 mi (1,861.11 km) |
| Harpenden to Kauniainen | 1,119.06 mi (1,800.96 km) |
| Harpenden to Kemi | 1,294.70 mi (2,083.62 km) |
| Harpenden to Kemijarvi | 1,398.98 mi (2,251.43 km) |
| Harpenden to Kempele | 1,285.39 mi (2,068.64 km) |
| Harpenden to Kerava | 1,135.19 mi (1,826.92 km) |
| Harpenden to Keuruu | 1,173.92 mi (1,889.24 km) |
| Harpenden to Kiiminki | 1,300.13 mi (2,092.36 km) |
| Harpenden to Kirkkonummi | 1,106.47 mi (1,780.69 km) |
| Harpenden to Kitee | 1,331.70 mi (2,143.16 km) |
| Harpenden to Kiuruvesi | 1,270.85 mi (2,045.24 km) |
| Harpenden to Kivisto | 1,125.21 mi (1,810.85 km) |
