| Niagara Falls to Kavak | 5,357.62 mi (8,622.26 km) |
| Niagara Falls to Kayapinar | 5,666.22 mi (9,118.91 km) |
| Niagara Falls to Kayseri | 5,457.31 mi (8,782.68 km) |
| Niagara Falls to Kemalpasa | 5,165.69 mi (8,313.38 km) |
| Niagara Falls to Kemer | 5,376.76 mi (8,653.07 km) |
| Niagara Falls to Keskin | 5,340.77 mi (8,595.13 km) |
| Niagara Falls to Kilimli | 5,186.02 mi (8,346.09 km) |
| Niagara Falls to Kilis | 5,619.84 mi (9,044.25 km) |
| Niagara Falls to Kinik | 5,132.54 mi (8,260.03 km) |
| Niagara Falls to Kirikkale | 5,328.69 mi (8,575.70 km) |
| Niagara Falls to Kirkagac | 5,143.50 mi (8,277.66 km) |
| Niagara Falls to Kirklareli | 5,002.33 mi (8,050.47 km) |
| Niagara Falls to Kirsehir | 5,387.31 mi (8,670.04 km) |
| Niagara Falls to Kizilpinar | 5,052.44 mi (8,131.12 km) |
| Niagara Falls to Kiziltepe | 5,719.68 mi (9,204.93 km) |
