| Niagara Falls to Kothen | 4,010.96 mi (6,455.02 km) |
| Niagara Falls to Kranenburg | 3,788.42 mi (6,096.88 km) |
| Niagara Falls to Krefeld | 3,824.28 mi (6,154.59 km) |
| Niagara Falls to Kressbronn am Bodensee | 4,070.38 mi (6,550.64 km) |
| Niagara Falls to Kreuzau | 3,840.32 mi (6,180.40 km) |
| Niagara Falls to Kreuztal | 3,889.72 mi (6,259.90 km) |
| Niagara Falls to Kriftel | 3,938.66 mi (6,338.66 km) |
| Niagara Falls to Kronach | 4,042.46 mi (6,505.72 km) |
| Niagara Falls to Kronberg | 3,936.52 mi (6,335.22 km) |
| Niagara Falls to Kronshagen | 3,857.11 mi (6,207.41 km) |
| Niagara Falls to Krumbach | 4,076.98 mi (6,561.26 km) |
| Niagara Falls to Kulmbach | 4,051.49 mi (6,520.24 km) |
| Niagara Falls to Kummersbruck | 4,093.30 mi (6,587.52 km) |
| Niagara Falls to Kunzell | 3,970.49 mi (6,389.89 km) |
| Niagara Falls to Kunzelsau | 4,013.42 mi (6,458.98 km) |
