| National City to Kalispell (Montana) | 1,084.04 mi (1,744.59 km) |
| National City to Kaneohe (Hawaii) | 2,604.59 mi (4,191.68 km) |
| National City to Kankakee (Illinois) | 1,707.80 mi (2,748.44 km) |
| National City to Kannapolis (North Carolina) | 2,083.80 mi (3,353.55 km) |
| National City to Kansas City (Kansas) | 1,324.19 mi (2,131.07 km) |
| National City to Kansas City (Missouri) | 1,334.14 mi (2,147.09 km) |
| National City to Kapaa (Hawaii) | 2,674.46 mi (4,304.13 km) |
| National City to Kapolei (Hawaii) | 2,622.62 mi (4,220.70 km) |
| National City to Katy (Texas) | 1,269.67 mi (2,043.34 km) |
| National City to Kaukauna (Wisconsin) | 1,741.34 mi (2,802.42 km) |
| National City to Kaysville (Utah) | 643.97 mi (1,036.36 km) |
| National City to Kearney (Missouri) | 1,347.80 mi (2,169.08 km) |
| National City to Kearney (Nebraska) | 1,139.02 mi (1,833.07 km) |
| National City to Kearns (Utah) | 619.43 mi (996.88 km) |
| National City to Kearny (New Jersey) | 2,420.01 mi (3,894.62 km) |
