| Diamond Bar to Joliet (Illinois) | 1,692.07 mi (2,723.13 km) |
| Diamond Bar to Jonesboro (Arkansas) | 1,537.81 mi (2,474.86 km) |
| Diamond Bar to Joplin (Missouri) | 1,324.50 mi (2,131.57 km) |
| Diamond Bar to Joppatowne (Maryland) | 2,306.56 mi (3,712.05 km) |
| Diamond Bar to Juana Díaz (Puerto Rico) | 3,333.12 mi (5,364.14 km) |
| Diamond Bar to Junction City (Kansas) | 1,211.80 mi (1,950.20 km) |
| Diamond Bar to Juneau (Alaska) | 1,850.46 mi (2,978.03 km) |
| Diamond Bar to Jupiter (Florida) | 2,284.80 mi (3,677.02 km) |
| Diamond Bar to Jupiter Farms (Florida) | 2,278.67 mi (3,667.16 km) |
| Diamond Bar to Jurupa Valley (California) | 19.79 mi (31.85 km) |
| Diamond Bar to Justice (Illinois) | 1,710.48 mi (2,752.75 km) |
| Diamond Bar to Kahului (Hawaii) | 2,519.29 mi (4,054.41 km) |
| Diamond Bar to Kailua (Hawaii) | 2,574.04 mi (4,142.52 km) |
| Diamond Bar to Kalamazoo (Michigan) | 1,829.70 mi (2,944.62 km) |
| Diamond Bar to Kalispell (Montana) | 998.61 mi (1,607.10 km) |
