| San Juan to Johnstown (Pennsylvania) | 1,697.03 mi (2,731.10 km) |
| San Juan to Joliet (Illinois) | 2,060.81 mi (3,316.56 km) |
| San Juan to Jonesboro (Arkansas) | 1,924.14 mi (3,096.60 km) |
| San Juan to Joplin (Missouri) | 2,151.09 mi (3,461.85 km) |
| San Juan to Joppatowne (Maryland) | 1,577.34 mi (2,538.48 km) |
| San Juan to Juana Díaz (Puerto Rico) | 37.63 mi (60.56 km) |
| San Juan to Junction City (Kansas) | 2,328.25 mi (3,746.95 km) |
| San Juan to Juneau (Alaska) | 4,352.65 mi (7,004.91 km) |
| San Juan to Jupiter (Florida) | 1,070.76 mi (1,723.22 km) |
| San Juan to Jupiter Farms (Florida) | 1,076.48 mi (1,732.42 km) |
| San Juan to Jurupa Valley (California) | 3,326.90 mi (5,354.13 km) |
| San Juan to Justice (Illinois) | 2,060.39 mi (3,315.88 km) |
| San Juan to Kahului (Hawaii) | 5,796.91 mi (9,329.22 km) |
| San Juan to Kailua (Hawaii) | 5,864.64 mi (9,438.22 km) |
| San Juan to Kalamazoo (Michigan) | 2,008.45 mi (3,232.29 km) |
