| San Marino to Johnstown (Pennsylvania) | 2,180.16 mi (3,508.62 km) |
| San Marino to Joliet (Illinois) | 1,703.50 mi (2,741.52 km) |
| San Marino to Jonesboro (Arkansas) | 1,552.60 mi (2,498.67 km) |
| San Marino to Joplin (Missouri) | 1,338.56 mi (2,154.20 km) |
| San Marino to Joppatowne (Maryland) | 2,319.25 mi (3,732.47 km) |
| San Marino to Juana Díaz (Puerto Rico) | 3,350.90 mi (5,392.75 km) |
| San Marino to Junction City (Kansas) | 1,224.26 mi (1,970.25 km) |
| San Marino to Juneau (Alaska) | 1,836.88 mi (2,956.17 km) |
| San Marino to Jupiter (Florida) | 2,302.09 mi (3,704.86 km) |
| San Marino to Jupiter Farms (Florida) | 2,295.97 mi (3,695.00 km) |
| San Marino to Jurupa Valley (California) | 37.73 mi (60.71 km) |
| San Marino to Justice (Illinois) | 1,721.79 mi (2,770.95 km) |
| San Marino to Kahului (Hawaii) | 2,504.25 mi (4,030.20 km) |
| San Marino to Kailua (Hawaii) | 2,558.65 mi (4,117.75 km) |
| San Marino to Kalamazoo (Michigan) | 1,840.82 mi (2,962.52 km) |
