| Darby to Joliet (Illinois) | 683.24 mi (1,099.58 km) |
| Darby to Jonesboro (Arkansas) | 885.97 mi (1,425.83 km) |
| Darby to Joplin (Missouri) | 1,056.66 mi (1,700.53 km) |
| Darby to Joppatowne (Maryland) | 67.61 mi (108.81 km) |
| Darby to Juana Díaz (Puerto Rico) | 1,598.83 mi (2,573.07 km) |
| Darby to Junction City (Kansas) | 1,150.31 mi (1,851.25 km) |
| Darby to Juneau (Alaska) | 2,836.65 mi (4,565.15 km) |
| Darby to Jupiter (Florida) | 940.43 mi (1,513.47 km) |
| Darby to Jupiter Farms (Florida) | 942.10 mi (1,516.17 km) |
| Darby to Jurupa Valley (California) | 2,343.79 mi (3,771.96 km) |
| Darby to Justice (Illinois) | 668.67 mi (1,076.13 km) |
| Darby to Kahului (Hawaii) | 4,852.32 mi (7,809.05 km) |
| Darby to Kailua (Hawaii) | 4,897.36 mi (7,881.54 km) |
| Darby to Kalamazoo (Michigan) | 561.35 mi (903.41 km) |
| Darby to Kalispell (Montana) | 1,998.29 mi (3,215.94 km) |
