| Thornton to Kinston (North Carolina) | 3,745.99 mi (6,028.59 km) |
| Thornton to Kirkland (Washington) | 4,607.37 mi (7,414.85 km) |
| Thornton to Kirksville (Missouri) | 4,076.37 mi (6,560.28 km) |
| Thornton to Kirkwood (Missouri) | 4,078.19 mi (6,563.21 km) |
| Thornton to Kiryas Joel (New York) | 3,324.16 mi (5,349.72 km) |
| Thornton to Kissimmee (Florida) | 4,251.02 mi (6,841.36 km) |
| Thornton to Klamath Falls (Oregon) | 4,912.47 mi (7,905.85 km) |
| Thornton to Knightdale (North Carolina) | 3,756.60 mi (6,045.66 km) |
| Thornton to Knik-Fairview (Alaska) | 4,278.11 mi (6,884.96 km) |
| Thornton to Knoxville (Tennessee) | 3,961.93 mi (6,376.11 km) |
| Thornton to Kokomo (Indiana) | 3,824.89 mi (6,155.57 km) |
| Thornton to Kuna (Idaho) | 4,687.05 mi (7,543.08 km) |
| Thornton to Kyle (Texas) | 4,804.74 mi (7,732.49 km) |
| Thornton to La Cañada Flintridge (California) | 5,272.00 mi (8,484.46 km) |
| Thornton to La Crescenta-Montrose (California) | 5,271.79 mi (8,484.12 km) |
