| West Mifflin to Johnstown (Pennsylvania) | 52.07 mi (83.80 km) |
| West Mifflin to Joliet (Illinois) | 437.45 mi (704.00 km) |
| West Mifflin to Jonesboro (Arkansas) | 663.69 mi (1,068.11 km) |
| West Mifflin to Joplin (Missouri) | 817.71 mi (1,315.98 km) |
| West Mifflin to Joppatowne (Maryland) | 199.36 mi (320.84 km) |
| West Mifflin to Juana Díaz (Puerto Rico) | 1,735.40 mi (2,792.85 km) |
| West Mifflin to Junction City (Kansas) | 904.09 mi (1,455.00 km) |
| West Mifflin to Juneau (Alaska) | 2,646.79 mi (4,259.59 km) |
| West Mifflin to Jupiter (Florida) | 928.56 mi (1,494.37 km) |
| West Mifflin to Jupiter Farms (Florida) | 928.50 mi (1,494.28 km) |
| West Mifflin to Jurupa Valley (California) | 2,097.56 mi (3,375.70 km) |
| West Mifflin to Justice (Illinois) | 423.90 mi (682.20 km) |
| West Mifflin to Kahului (Hawaii) | 4,605.34 mi (7,411.58 km) |
| West Mifflin to Kailua (Hawaii) | 4,650.68 mi (7,484.54 km) |
| West Mifflin to Kalamazoo (Michigan) | 323.10 mi (519.98 km) |
