| Middle River to Johnstown (Pennsylvania) | 148.71 mi (239.33 km) |
| Middle River to Joliet (Illinois) | 634.13 mi (1,020.53 km) |
| Middle River to Jonesboro (Arkansas) | 816.49 mi (1,314.01 km) |
| Middle River to Joplin (Missouri) | 992.08 mi (1,596.60 km) |
| Middle River to Joppatowne (Maryland) | 6.48 mi (10.43 km) |
| Middle River to Juana Díaz (Puerto Rico) | 1,586.59 mi (2,553.37 km) |
| Middle River to Junction City (Kansas) | 1,091.76 mi (1,757.02 km) |
| Middle River to Juneau (Alaska) | 2,823.85 mi (4,544.55 km) |
| Middle River to Jupiter (Florida) | 884.27 mi (1,423.10 km) |
| Middle River to Jupiter Farms (Florida) | 885.61 mi (1,425.26 km) |
| Middle River to Jurupa Valley (California) | 2,284.52 mi (3,676.58 km) |
| Middle River to Justice (Illinois) | 621.11 mi (999.58 km) |
| Middle River to Kahului (Hawaii) | 4,799.01 mi (7,723.26 km) |
| Middle River to Kailua (Hawaii) | 4,845.12 mi (7,797.47 km) |
| Middle River to Kalamazoo (Michigan) | 519.87 mi (836.65 km) |
