| Niagara Falls to Kirchlengern | 3,874.05 mi (6,234.68 km) |
| Niagara Falls to Kirchlinteln | 3,874.93 mi (6,236.10 km) |
| Niagara Falls to Kirchseeon | 4,142.82 mi (6,667.22 km) |
| Niagara Falls to Kirchzarten | 3,991.51 mi (6,423.71 km) |
| Niagara Falls to Kirkel | 3,917.80 mi (6,305.09 km) |
| Niagara Falls to Kissing | 4,099.27 mi (6,597.14 km) |
| Niagara Falls to Kisslegg | 4,074.62 mi (6,557.47 km) |
| Niagara Falls to Kitzingen | 4,016.20 mi (6,463.45 km) |
| Niagara Falls to Kleinblittersdorf | 3,914.34 mi (6,299.53 km) |
| Niagara Falls to Kleve | 3,793.46 mi (6,104.99 km) |
| Niagara Falls to Klipphausen | 4,094.41 mi (6,589.32 km) |
| Niagara Falls to Klotze | 3,952.89 mi (6,361.56 km) |
| Niagara Falls to Koblenz | 3,895.80 mi (6,269.68 km) |
| Niagara Falls to Kolbermoor | 4,158.16 mi (6,691.91 km) |
| Niagara Falls to Kolkwitz | 4,096.09 mi (6,592.02 km) |
