| Waltham to Kingsville (Texas) | 1,812.25 mi (2,916.53 km) |
| Waltham to Kinston (North Carolina) | 598.33 mi (962.91 km) |
| Waltham to Kirkland (Washington) | 2,469.29 mi (3,973.94 km) |
| Waltham to Kirksville (Missouri) | 1,114.73 mi (1,793.99 km) |
| Waltham to Kirkwood (Missouri) | 1,039.15 mi (1,672.34 km) |
| Waltham to Kiryas Joel (New York) | 166.97 mi (268.72 km) |
| Waltham to Kissimmee (Florida) | 1,127.56 mi (1,814.63 km) |
| Waltham to Klamath Falls (Oregon) | 2,542.88 mi (4,092.37 km) |
| Waltham to Knightdale (North Carolina) | 598.81 mi (963.69 km) |
| Waltham to Knik-Fairview (Alaska) | 3,346.60 mi (5,385.83 km) |
| Waltham to Knoxville (Tennessee) | 811.01 mi (1,305.20 km) |
| Waltham to Kokomo (Indiana) | 781.49 mi (1,257.68 km) |
| Waltham to Kuna (Idaho) | 2,256.74 mi (3,631.87 km) |
| Waltham to Kyle (Texas) | 1,704.16 mi (2,742.57 km) |
| Waltham to La Cañada Flintridge (California) | 2,574.26 mi (4,142.87 km) |
