| Waltham to Kennewick (Washington) | 2,348.73 mi (3,779.92 km) |
| Waltham to Kenosha (Wisconsin) | 846.31 mi (1,362.01 km) |
| Waltham to Kent (Ohio) | 528.10 mi (849.89 km) |
| Waltham to Kent (Washington) | 2,473.69 mi (3,981.03 km) |
| Waltham to Kentwood (Michigan) | 729.33 mi (1,173.75 km) |
| Waltham to Kerman (California) | 2,593.89 mi (4,174.46 km) |
| Waltham to Kernersville (North Carolina) | 641.40 mi (1,032.23 km) |
| Waltham to Kerrville (Texas) | 1,761.76 mi (2,835.27 km) |
| Waltham to Kettering (Maryland) | 378.07 mi (608.45 km) |
| Waltham to Kettering (Ohio) | 697.09 mi (1,121.86 km) |
| Waltham to Kewanee (Illinois) | 963.47 mi (1,550.55 km) |
| Waltham to Key Biscayne (Florida) | 1,259.97 mi (2,027.72 km) |
| Waltham to Key Largo (Florida) | 1,302.15 mi (2,095.61 km) |
| Waltham to Key West (Florida) | 1,370.46 mi (2,205.55 km) |
| Waltham to Keystone (Florida) | 1,172.72 mi (1,887.30 km) |
