| Mercer Island to Johnstown (Pennsylvania) | 2,181.93 mi (3,511.48 km) |
| Mercer Island to Joliet (Illinois) | 1,714.63 mi (2,759.43 km) |
| Mercer Island to Jonesboro (Arkansas) | 1,801.99 mi (2,900.02 km) |
| Mercer Island to Joplin (Missouri) | 1,579.47 mi (2,541.91 km) |
| Mercer Island to Joppatowne (Maryland) | 2,331.50 mi (3,752.19 km) |
| Mercer Island to Juana Díaz (Puerto Rico) | 3,720.28 mi (5,987.21 km) |
| Mercer Island to Junction City (Kansas) | 1,397.64 mi (2,249.29 km) |
| Mercer Island to Juneau (Alaska) | 898.45 mi (1,445.91 km) |
| Mercer Island to Jupiter (Florida) | 2,674.06 mi (4,303.48 km) |
| Mercer Island to Jupiter Farms (Florida) | 2,669.22 mi (4,295.70 km) |
| Mercer Island to Jurupa Valley (California) | 969.30 mi (1,559.94 km) |
| Mercer Island to Justice (Illinois) | 1,722.47 mi (2,772.05 km) |
| Mercer Island to Kahului (Hawaii) | 2,649.83 mi (4,264.49 km) |
| Mercer Island to Kailua (Hawaii) | 2,672.67 mi (4,301.24 km) |
| Mercer Island to Kalamazoo (Michigan) | 1,811.96 mi (2,916.08 km) |
