| Niagara Falls to Jicin | 4,185.43 mi (6,735.80 km) |
| Niagara Falls to Jihlava | 4,233.90 mi (6,813.81 km) |
| Niagara Falls to Jindrichuv Hradec | 4,221.73 mi (6,794.23 km) |
| Niagara Falls to Jirkov | 4,112.63 mi (6,618.64 km) |
| Niagara Falls to Kadan | 4,110.61 mi (6,615.38 km) |
| Niagara Falls to Karlovy Vary | 4,101.02 mi (6,599.95 km) |
| Niagara Falls to Karvina | 4,324.80 mi (6,960.09 km) |
| Niagara Falls to Kladno | 4,149.88 mi (6,678.58 km) |
| Niagara Falls to Klasterec nad Ohri | 4,106.56 mi (6,608.87 km) |
| Niagara Falls to Klatovy | 4,147.77 mi (6,675.19 km) |
| Niagara Falls to Kolin | 4,195.37 mi (6,751.79 km) |
| Niagara Falls to Koprivnice | 4,320.46 mi (6,953.12 km) |
| Niagara Falls to Kralupy nad Vltavou | 4,154.34 mi (6,685.77 km) |
| Niagara Falls to Kraluv Dvur | 4,154.91 mi (6,686.68 km) |
| Niagara Falls to Krnov | 4,284.71 mi (6,895.58 km) |
