| Waltham to Keene (New Hampshire) | 66.23 mi (106.58 km) |
| Waltham to Keizer (Oregon) | 2,548.73 mi (4,101.78 km) |
| Waltham to Keller (Texas) | 1,555.88 mi (2,503.95 km) |
| Waltham to Kelso (Washington) | 2,523.65 mi (4,061.42 km) |
| Waltham to Kemp Mill (Maryland) | 380.77 mi (612.79 km) |
| Waltham to Ken Caryl (Colorado) | 1,765.60 mi (2,841.46 km) |
| Waltham to Kendale Lakes (Florida) | 1,264.45 mi (2,034.93 km) |
| Waltham to Kendall (Florida) | 1,265.70 mi (2,036.94 km) |
| Waltham to Kendall Park (New Jersey) | 219.63 mi (353.45 km) |
| Waltham to Kendall West (Florida) | 1,265.28 mi (2,036.26 km) |
| Waltham to Kenmore (New York) | 389.43 mi (626.72 km) |
| Waltham to Kenmore (Washington) | 2,470.56 mi (3,975.98 km) |
| Waltham to Kenner (Louisiana) | 1,356.50 mi (2,183.08 km) |
| Waltham to Kennesaw (Georgia) | 926.07 mi (1,490.37 km) |
| Waltham to Kennett (Missouri) | 1,088.34 mi (1,751.52 km) |
