| Quincy to Johnstown (Pennsylvania) | 431.00 mi (693.63 km) |
| Quincy to Joliet (Illinois) | 881.18 mi (1,418.12 km) |
| Quincy to Jonesboro (Arkansas) | 1,141.41 mi (1,836.93 km) |
| Quincy to Joplin (Missouri) | 1,294.50 mi (2,083.29 km) |
| Quincy to Joppatowne (Maryland) | 340.51 mi (548.00 km) |
| Quincy to Juana Díaz (Puerto Rico) | 1,692.84 mi (2,724.37 km) |
| Quincy to Junction City (Kansas) | 1,367.14 mi (2,200.19 km) |
| Quincy to Juneau (Alaska) | 2,873.72 mi (4,624.81 km) |
| Quincy to Jupiter (Florida) | 1,177.08 mi (1,894.33 km) |
| Quincy to Jupiter Farms (Florida) | 1,179.57 mi (1,898.33 km) |
| Quincy to Jurupa Valley (California) | 2,555.48 mi (4,112.65 km) |
| Quincy to Justice (Illinois) | 862.72 mi (1,388.42 km) |
| Quincy to Kahului (Hawaii) | 5,034.93 mi (8,102.93 km) |
| Quincy to Kailua (Hawaii) | 5,075.66 mi (8,168.48 km) |
| Quincy to Kalamazoo (Michigan) | 744.08 mi (1,197.49 km) |
