| Herndon to Koscian | 4,314.89 mi (6,944.15 km) |
| Herndon to Koscielisko | 4,535.14 mi (7,298.61 km) |
| Herndon to Koscierzyna | 4,295.29 mi (6,912.60 km) |
| Herndon to Kostrzyn | 4,325.60 mi (6,961.38 km) |
| Herndon to Kostrzyn nad Odra | 4,224.62 mi (6,798.87 km) |
| Herndon to Koszalin | 4,228.44 mi (6,805.02 km) |
| Herndon to Kowary | 4,327.43 mi (6,964.33 km) |
| Herndon to Kozienice | 4,513.07 mi (7,263.08 km) |
| Herndon to Kozuchow | 4,286.72 mi (6,898.82 km) |
| Herndon to Kozy | 4,485.97 mi (7,219.48 km) |
| Herndon to Krakow | 4,508.68 mi (7,256.02 km) |
| Herndon to Krapkowice | 4,419.73 mi (7,112.87 km) |
| Herndon to Krasnik | 4,561.58 mi (7,341.15 km) |
| Herndon to Krasnystaw | 4,594.24 mi (7,393.72 km) |
| Herndon to Krosno | 4,590.79 mi (7,388.17 km) |
