| Potomac to Koscian | 4,305.54 mi (6,929.10 km) |
| Potomac to Koscielisko | 4,525.65 mi (7,283.33 km) |
| Potomac to Koscierzyna | 4,286.17 mi (6,897.92 km) |
| Potomac to Kostrzyn | 4,316.29 mi (6,946.40 km) |
| Potomac to Kostrzyn nad Odra | 4,215.25 mi (6,783.80 km) |
| Potomac to Koszalin | 4,219.28 mi (6,790.27 km) |
| Potomac to Kowary | 4,317.94 mi (6,949.05 km) |
| Potomac to Kozienice | 4,503.83 mi (7,248.22 km) |
| Potomac to Kozuchow | 4,277.31 mi (6,883.66 km) |
| Potomac to Kozy | 4,476.50 mi (7,204.24 km) |
| Potomac to Krakow | 4,499.25 mi (7,240.85 km) |
| Potomac to Krapkowice | 4,410.28 mi (7,097.65 km) |
| Potomac to Krasnik | 4,552.31 mi (7,326.23 km) |
| Potomac to Krasnystaw | 4,585.01 mi (7,378.86 km) |
| Potomac to Krosno | 4,581.40 mi (7,373.05 km) |
