| Frederick to Joliet (Illinois) | 581.92 mi (936.50 km) |
| Frederick to Jonesboro (Arkansas) | 766.71 mi (1,233.90 km) |
| Frederick to Joplin (Missouri) | 939.84 mi (1,512.52 km) |
| Frederick to Joppatowne (Maryland) | 56.72 mi (91.28 km) |
| Frederick to Juana Díaz (Puerto Rico) | 1,615.25 mi (2,599.50 km) |
| Frederick to Junction City (Kansas) | 1,038.62 mi (1,671.49 km) |
| Frederick to Juneau (Alaska) | 2,783.55 mi (4,479.69 km) |
| Frederick to Jupiter (Florida) | 878.46 mi (1,413.74 km) |
| Frederick to Jupiter Farms (Florida) | 879.41 mi (1,415.27 km) |
| Frederick to Jurupa Valley (California) | 2,231.44 mi (3,591.16 km) |
| Frederick to Justice (Illinois) | 569.24 mi (916.10 km) |
| Frederick to Kahului (Hawaii) | 4,745.95 mi (7,637.86 km) |
| Frederick to Kailua (Hawaii) | 4,792.14 mi (7,712.21 km) |
| Frederick to Kalamazoo (Michigan) | 469.86 mi (756.17 km) |
| Frederick to Kalispell (Montana) | 1,916.27 mi (3,083.94 km) |
