| Caerphilly to Karis | 1,184.99 mi (1,907.06 km) |
| Caerphilly to Karkkila | 1,212.91 mi (1,951.99 km) |
| Caerphilly to Kauhajoki | 1,201.24 mi (1,933.21 km) |
| Caerphilly to Kauhava | 1,247.26 mi (2,007.26 km) |
| Caerphilly to Kauniainen | 1,223.16 mi (1,968.48 km) |
| Caerphilly to Kemi | 1,376.13 mi (2,214.67 km) |
| Caerphilly to Kemijarvi | 1,479.46 mi (2,380.96 km) |
| Caerphilly to Kempele | 1,371.20 mi (2,206.73 km) |
| Caerphilly to Kerava | 1,238.82 mi (1,993.69 km) |
| Caerphilly to Keuruu | 1,269.88 mi (2,043.67 km) |
| Caerphilly to Kiiminki | 1,385.31 mi (2,229.44 km) |
| Caerphilly to Kirkkonummi | 1,210.75 mi (1,948.51 km) |
| Caerphilly to Kitee | 1,431.89 mi (2,304.41 km) |
| Caerphilly to Kiuruvesi | 1,362.81 mi (2,193.23 km) |
| Caerphilly to Kivisto | 1,228.96 mi (1,977.82 km) |
