| South San Francisco to Johnstown (Pennsylvania) | 2,319.89 mi (3,733.50 km) |
| South San Francisco to Joliet (Illinois) | 1,832.03 mi (2,948.36 km) |
| South San Francisco to Jonesboro (Arkansas) | 1,753.67 mi (2,822.25 km) |
| South San Francisco to Joplin (Missouri) | 1,527.93 mi (2,458.97 km) |
| South San Francisco to Joppatowne (Maryland) | 2,465.51 mi (3,967.86 km) |
| South San Francisco to Juana Díaz (Puerto Rico) | 3,615.39 mi (5,818.42 km) |
| South San Francisco to Junction City (Kansas) | 1,384.32 mi (2,227.85 km) |
| South San Francisco to Juneau (Alaska) | 1,531.10 mi (2,464.07 km) |
| South San Francisco to Jupiter (Florida) | 2,556.39 mi (4,114.11 km) |
| South San Francisco to Jupiter Farms (Florida) | 2,550.53 mi (4,104.68 km) |
| South San Francisco to Jurupa Valley (California) | 374.80 mi (603.19 km) |
| South San Francisco to Justice (Illinois) | 1,847.49 mi (2,973.24 km) |
| South San Francisco to Kahului (Hawaii) | 2,337.79 mi (3,762.30 km) |
| South San Francisco to Kailua (Hawaii) | 2,382.47 mi (3,834.21 km) |
| South San Francisco to Kalamazoo (Michigan) | 1,960.80 mi (3,155.60 km) |
