| Castlebar to Karis | 1,297.47 mi (2,088.07 km) |
| Castlebar to Karkkila | 1,319.16 mi (2,122.98 km) |
| Castlebar to Kauhajoki | 1,273.95 mi (2,050.22 km) |
| Castlebar to Kauhava | 1,312.08 mi (2,111.58 km) |
| Castlebar to Kauniainen | 1,334.95 mi (2,148.40 km) |
| Castlebar to Kemi | 1,407.14 mi (2,264.58 km) |
| Castlebar to Kemijarvi | 1,504.53 mi (2,421.31 km) |
| Castlebar to Kempele | 1,415.93 mi (2,278.73 km) |
| Castlebar to Kerava | 1,348.37 mi (2,169.99 km) |
| Castlebar to Keuruu | 1,351.04 mi (2,174.29 km) |
| Castlebar to Kiiminki | 1,427.63 mi (2,297.55 km) |
| Castlebar to Kirkkonummi | 1,323.61 mi (2,130.15 km) |
| Castlebar to Kitee | 1,523.43 mi (2,451.73 km) |
| Castlebar to Kiuruvesi | 1,427.65 mi (2,297.58 km) |
| Castlebar to Kivisto | 1,339.31 mi (2,155.41 km) |
