| Boston to Kinston (North Carolina) | 3,832.55 mi (6,167.89 km) |
| Boston to Kirkland (Washington) | 4,698.43 mi (7,561.39 km) |
| Boston to Kirksville (Missouri) | 4,169.33 mi (6,709.88 km) |
| Boston to Kirkwood (Missouri) | 4,170.36 mi (6,711.54 km) |
| Boston to Kiryas Joel (New York) | 3,412.73 mi (5,492.26 km) |
| Boston to Kissimmee (Florida) | 4,335.64 mi (6,977.53 km) |
| Boston to Klamath Falls (Oregon) | 5,004.80 mi (8,054.44 km) |
| Boston to Knightdale (North Carolina) | 3,843.84 mi (6,186.06 km) |
| Boston to Knik-Fairview (Alaska) | 4,353.30 mi (7,005.96 km) |
| Boston to Knoxville (Tennessee) | 4,051.38 mi (6,520.06 km) |
| Boston to Kokomo (Indiana) | 3,916.64 mi (6,303.22 km) |
| Boston to Kuna (Idaho) | 4,780.14 mi (7,692.90 km) |
| Boston to Kyle (Texas) | 4,896.51 mi (7,880.18 km) |
| Boston to La Cañada Flintridge (California) | 5,365.86 mi (8,635.52 km) |
| Boston to La Crescenta-Montrose (California) | 5,365.65 mi (8,635.17 km) |
