| Thornton to Joliet (Illinois) | 3,849.18 mi (6,194.65 km) |
| Thornton to Jonesboro (Arkansas) | 4,227.35 mi (6,803.27 km) |
| Thornton to Joplin (Missouri) | 4,305.48 mi (6,929.00 km) |
| Thornton to Joppatowne (Maryland) | 3,498.41 mi (5,630.15 km) |
| Thornton to Juana Díaz (Puerto Rico) | 4,188.96 mi (6,741.48 km) |
| Thornton to Junction City (Kansas) | 4,290.05 mi (6,904.17 km) |
| Thornton to Juneau (Alaska) | 4,238.57 mi (6,821.32 km) |
| Thornton to Jupiter (Florida) | 4,270.40 mi (6,872.54 km) |
| Thornton to Jupiter Farms (Florida) | 4,274.57 mi (6,879.26 km) |
| Thornton to Jurupa Valley (California) | 5,261.25 mi (8,467.17 km) |
| Thornton to Justice (Illinois) | 3,826.39 mi (6,157.98 km) |
| Thornton to Kahului (Hawaii) | 7,060.86 mi (11,363.36 km) |
| Thornton to Kailua (Hawaii) | 7,046.92 mi (11,340.93 km) |
| Thornton to Kalamazoo (Michigan) | 3,718.02 mi (5,983.58 km) |
| Thornton to Kalispell (Montana) | 4,365.52 mi (7,025.63 km) |
