| Waltham to Johnstown (Pennsylvania) | 422.70 mi (680.27 km) |
| Waltham to Joliet (Illinois) | 869.41 mi (1,399.18 km) |
| Waltham to Jonesboro (Arkansas) | 1,133.23 mi (1,823.76 km) |
| Waltham to Joplin (Missouri) | 1,284.61 mi (2,067.38 km) |
| Waltham to Joppatowne (Maryland) | 336.53 mi (541.59 km) |
| Waltham to Juana Díaz (Puerto Rico) | 1,704.34 mi (2,742.87 km) |
| Waltham to Junction City (Kansas) | 1,355.87 mi (2,182.07 km) |
| Waltham to Juneau (Alaska) | 2,858.89 mi (4,600.95 km) |
| Waltham to Jupiter (Florida) | 1,180.07 mi (1,899.14 km) |
| Waltham to Jupiter Farms (Florida) | 1,182.48 mi (1,903.02 km) |
| Waltham to Jurupa Valley (California) | 2,543.62 mi (4,093.57 km) |
| Waltham to Justice (Illinois) | 850.81 mi (1,369.25 km) |
| Waltham to Kahului (Hawaii) | 5,021.67 mi (8,081.59 km) |
| Waltham to Kailua (Hawaii) | 5,062.26 mi (8,146.91 km) |
| Waltham to Kalamazoo (Michigan) | 731.93 mi (1,177.92 km) |
