| Grayslake to Joliet (Illinois) | 57.09 mi (91.87 km) |
| Grayslake to Jonesboro (Arkansas) | 472.19 mi (759.91 km) |
| Grayslake to Joplin (Missouri) | 500.22 mi (805.02 km) |
| Grayslake to Joppatowne (Maryland) | 642.19 mi (1,033.50 km) |
| Grayslake to Juana Díaz (Puerto Rico) | 2,100.84 mi (3,380.98 km) |
| Grayslake to Junction City (Kansas) | 515.20 mi (829.13 km) |
| Grayslake to Juneau (Alaska) | 2,256.11 mi (3,630.87 km) |
| Grayslake to Jupiter (Florida) | 1,155.38 mi (1,859.40 km) |
| Grayslake to Jupiter Farms (Florida) | 1,152.93 mi (1,855.47 km) |
| Grayslake to Jurupa Valley (California) | 1,689.41 mi (2,718.83 km) |
| Grayslake to Justice (Illinois) | 42.10 mi (67.75 km) |
| Grayslake to Kahului (Hawaii) | 4,173.37 mi (6,716.39 km) |
| Grayslake to Kailua (Hawaii) | 4,216.65 mi (6,786.04 km) |
| Grayslake to Kalamazoo (Michigan) | 125.04 mi (201.23 km) |
| Grayslake to Kalispell (Montana) | 1,333.64 mi (2,146.28 km) |
