| Johnstown to Joliet (Illinois) | 488.64 mi (786.39 km) |
| Johnstown to Jonesboro (Arkansas) | 710.53 mi (1,143.49 km) |
| Johnstown to Joplin (Missouri) | 868.43 mi (1,397.60 km) |
| Johnstown to Joppatowne (Maryland) | 149.91 mi (241.26 km) |
| Johnstown to Juana Díaz (Puerto Rico) | 1,707.25 mi (2,747.55 km) |
| Johnstown to Junction City (Kansas) | 956.12 mi (1,538.73 km) |
| Johnstown to Juneau (Alaska) | 2,684.05 mi (4,319.57 km) |
| Johnstown to Jupiter (Florida) | 928.78 mi (1,494.73 km) |
| Johnstown to Jupiter Farms (Florida) | 929.09 mi (1,495.23 km) |
| Johnstown to Jurupa Valley (California) | 2,149.60 mi (3,459.45 km) |
| Johnstown to Justice (Illinois) | 474.67 mi (763.92 km) |
| Johnstown to Kahului (Hawaii) | 4,657.12 mi (7,494.91 km) |
| Johnstown to Kailua (Hawaii) | 4,702.33 mi (7,567.67 km) |
| Johnstown to Kalamazoo (Michigan) | 371.29 mi (597.54 km) |
| Johnstown to Kalispell (Montana) | 1,816.32 mi (2,923.08 km) |
