| Boston to Jozefow | 891.52 mi (1,434.75 km) |
| Boston to Kalisz | 766.23 mi (1,233.13 km) |
| Boston to Kamien Pomorski | 611.15 mi (983.55 km) |
| Boston to Kamienna Gora | 699.72 mi (1,126.09 km) |
| Boston to Karczew | 892.94 mi (1,437.05 km) |
| Boston to Kartuzy | 749.90 mi (1,206.84 km) |
| Boston to Katowice | 835.16 mi (1,344.05 km) |
| Boston to Kedzierzyn-Kozle | 799.35 mi (1,286.43 km) |
| Boston to Kepno | 770.46 mi (1,239.94 km) |
| Boston to Ketrzyn | 879.04 mi (1,414.68 km) |
| Boston to Kety | 852.53 mi (1,372.01 km) |
| Boston to Kielce | 888.77 mi (1,430.33 km) |
| Boston to Kielczow | 739.74 mi (1,190.49 km) |
| Boston to Klobuck | 817.19 mi (1,315.14 km) |
| Boston to Klodzko | 733.28 mi (1,180.10 km) |
