| Boston to Karis | 1,019.31 mi (1,640.42 km) |
| Boston to Karkkila | 1,047.50 mi (1,685.78 km) |
| Boston to Kauhajoki | 1,039.15 mi (1,672.34 km) |
| Boston to Kauhava | 1,086.09 mi (1,747.89 km) |
| Boston to Kauniainen | 1,057.46 mi (1,701.82 km) |
| Boston to Kemi | 1,220.33 mi (1,963.94 km) |
| Boston to Kemijarvi | 1,324.32 mi (2,131.29 km) |
| Boston to Kempele | 1,212.76 mi (1,951.75 km) |
| Boston to Kerava | 1,073.21 mi (1,727.16 km) |
| Boston to Keuruu | 1,106.47 mi (1,780.69 km) |
| Boston to Kiiminki | 1,227.24 mi (1,975.06 km) |
| Boston to Kirkkonummi | 1,045.02 mi (1,681.80 km) |
| Boston to Kitee | 1,267.12 mi (2,039.24 km) |
| Boston to Kiuruvesi | 1,201.16 mi (1,933.08 km) |
| Boston to Kivisto | 1,063.32 mi (1,711.25 km) |
