| Rancho Santa Margarita to Kalispell (Montana) | 1,021.74 mi (1,644.33 km) |
| Rancho Santa Margarita to Kaneohe (Hawaii) | 2,584.87 mi (4,159.95 km) |
| Rancho Santa Margarita to Kankakee (Illinois) | 1,702.85 mi (2,740.48 km) |
| Rancho Santa Margarita to Kannapolis (North Carolina) | 2,094.69 mi (3,371.08 km) |
| Rancho Santa Margarita to Kansas City (Kansas) | 1,322.68 mi (2,128.65 km) |
| Rancho Santa Margarita to Kansas City (Missouri) | 1,332.74 mi (2,144.84 km) |
| Rancho Santa Margarita to Kapaa (Hawaii) | 2,652.26 mi (4,268.39 km) |
| Rancho Santa Margarita to Kapolei (Hawaii) | 2,602.79 mi (4,188.78 km) |
| Rancho Santa Margarita to Katy (Texas) | 1,303.86 mi (2,098.36 km) |
| Rancho Santa Margarita to Kaukauna (Wisconsin) | 1,726.94 mi (2,779.25 km) |
| Rancho Santa Margarita to Kaysville (Utah) | 597.73 mi (961.96 km) |
| Rancho Santa Margarita to Kearney (Missouri) | 1,345.65 mi (2,165.62 km) |
| Rancho Santa Margarita to Kearney (Nebraska) | 1,127.36 mi (1,814.31 km) |
| Rancho Santa Margarita to Kearns (Utah) | 574.18 mi (924.05 km) |
| Rancho Santa Margarita to Kearny (New Jersey) | 2,417.70 mi (3,890.92 km) |
