| National City to Kingsville (Texas) | 1,201.94 mi (1,934.33 km) |
| National City to Kinston (North Carolina) | 2,255.95 mi (3,630.61 km) |
| National City to Kirkland (Washington) | 1,072.38 mi (1,725.84 km) |
| National City to Kirksville (Missouri) | 1,453.32 mi (2,338.90 km) |
| National City to Kirkwood (Missouri) | 1,546.93 mi (2,489.54 km) |
| National City to Kiryas Joel (New York) | 2,417.41 mi (3,890.44 km) |
| National City to Kissimmee (Florida) | 2,135.77 mi (3,437.19 km) |
| National City to Klamath Falls (Oregon) | 707.93 mi (1,139.30 km) |
| National City to Knightdale (North Carolina) | 2,201.55 mi (3,543.05 km) |
| National City to Knik-Fairview (Alaska) | 2,460.72 mi (3,960.15 km) |
| National City to Knoxville (Tennessee) | 1,896.25 mi (3,051.73 km) |
| National City to Kokomo (Indiana) | 1,790.60 mi (2,881.69 km) |
| National City to Kuna (Idaho) | 748.74 mi (1,204.99 km) |
| National City to Kyle (Texas) | 1,147.23 mi (1,846.28 km) |
| National City to La Cañada Flintridge (California) | 124.18 mi (199.85 km) |
