| Boulder to Kelkheim (Taunus) | 5,027.32 mi (8,090.69 km) |
| Boulder to Kelsterbach | 5,033.54 mi (8,100.70 km) |
| Boulder to Kemberg | 5,079.60 mi (8,174.82 km) |
| Boulder to Kempen | 4,904.60 mi (7,893.19 km) |
| Boulder to Kempten | 5,203.24 mi (8,373.81 km) |
| Boulder to Kenzingen | 5,096.03 mi (8,201.26 km) |
| Boulder to Kerpen | 4,936.15 mi (7,943.96 km) |
| Boulder to Ketsch | 5,066.36 mi (8,153.52 km) |
| Boulder to Kevelaer | 4,889.23 mi (7,868.45 km) |
| Boulder to Kiel | 4,883.22 mi (7,858.79 km) |
| Boulder to Kierspe | 4,952.38 mi (7,970.09 km) |
| Boulder to Kirchhain | 5,010.49 mi (8,063.60 km) |
| Boulder to Kirchheim bei Munchen | 5,228.87 mi (8,415.05 km) |
| Boulder to Kirchheim unter Teck | 5,130.63 mi (8,256.95 km) |
| Boulder to Kirchhundem | 4,970.54 mi (7,999.31 km) |
