| Placentia to Johnstown (Pennsylvania) | 2,173.14 mi (3,497.33 km) |
| Placentia to Joliet (Illinois) | 1,697.76 mi (2,732.28 km) |
| Placentia to Jonesboro (Arkansas) | 1,541.79 mi (2,481.27 km) |
| Placentia to Joplin (Missouri) | 1,328.93 mi (2,138.70 km) |
| Placentia to Joppatowne (Maryland) | 2,311.68 mi (3,720.28 km) |
| Placentia to Juana Díaz (Puerto Rico) | 3,334.54 mi (5,366.42 km) |
| Placentia to Junction City (Kansas) | 1,217.05 mi (1,958.66 km) |
| Placentia to Juneau (Alaska) | 1,857.47 mi (2,989.31 km) |
| Placentia to Jupiter (Florida) | 2,286.77 mi (3,680.20 km) |
| Placentia to Jupiter Farms (Florida) | 2,280.63 mi (3,670.32 km) |
| Placentia to Jurupa Valley (California) | 23.57 mi (37.93 km) |
| Placentia to Justice (Illinois) | 1,716.22 mi (2,761.99 km) |
| Placentia to Kahului (Hawaii) | 2,515.54 mi (4,048.37 km) |
| Placentia to Kailua (Hawaii) | 2,570.52 mi (4,136.85 km) |
| Placentia to Kalamazoo (Michigan) | 1,835.51 mi (2,953.97 km) |
