| Niagara Falls to Karahalli | 5,252.92 mi (8,453.76 km) |
| Niagara Falls to Karakocan | 5,607.42 mi (9,024.27 km) |
| Niagara Falls to Karakopru | 5,656.30 mi (9,102.93 km) |
| Niagara Falls to Karaman | 5,450.61 mi (8,771.90 km) |
| Niagara Falls to Karapinar | 5,436.46 mi (8,749.14 km) |
| Niagara Falls to Karatas | 5,563.38 mi (8,953.39 km) |
| Niagara Falls to Karatepe | 5,153.31 mi (8,293.45 km) |
| Niagara Falls to Karayilan | 5,587.25 mi (8,991.80 km) |
| Niagara Falls to Kargipinar | 5,521.88 mi (8,886.61 km) |
| Niagara Falls to Karkamis | 5,645.99 mi (9,086.35 km) |
| Niagara Falls to Karliova | 5,622.73 mi (9,048.91 km) |
| Niagara Falls to Kars | 5,622.46 mi (9,048.47 km) |
| Niagara Falls to Kartal | 5,116.72 mi (8,234.56 km) |
| Niagara Falls to Kas | 5,360.39 mi (8,626.72 km) |
| Niagara Falls to Kastamonu | 5,261.74 mi (8,467.96 km) |
