| National City to Kennewick (Washington) | 941.44 mi (1,515.10 km) |
| National City to Kenosha (Wisconsin) | 1,728.61 mi (2,781.93 km) |
| National City to Kent (Ohio) | 2,043.55 mi (3,288.77 km) |
| National City to Kent (Washington) | 1,052.05 mi (1,693.11 km) |
| National City to Kentwood (Michigan) | 1,846.24 mi (2,971.24 km) |
| National City to Kerman (California) | 327.10 mi (526.41 km) |
| National City to Kernersville (North Carolina) | 2,111.16 mi (3,397.58 km) |
| National City to Kerrville (Texas) | 1,074.14 mi (1,728.66 km) |
| National City to Kettering (Maryland) | 2,281.14 mi (3,671.15 km) |
| National City to Kettering (Ohio) | 1,889.03 mi (3,040.09 km) |
| National City to Kewanee (Illinois) | 1,604.70 mi (2,582.52 km) |
| National City to Key Biscayne (Florida) | 2,267.66 mi (3,649.45 km) |
| National City to Key Largo (Florida) | 2,267.71 mi (3,649.52 km) |
| National City to Key West (Florida) | 2,203.22 mi (3,545.74 km) |
| National City to Keystone (Florida) | 2,070.51 mi (3,332.16 km) |
