| Rancho Santa Margarita to Kingsville (Texas) | 1,245.56 mi (2,004.54 km) |
| Rancho Santa Margarita to Kinston (North Carolina) | 2,266.58 mi (3,647.71 km) |
| Rancho Santa Margarita to Kirkland (Washington) | 1,000.88 mi (1,610.76 km) |
| Rancho Santa Margarita to Kirksville (Missouri) | 1,449.15 mi (2,332.19 km) |
| Rancho Santa Margarita to Kirkwood (Missouri) | 1,549.12 mi (2,493.07 km) |
| Rancho Santa Margarita to Kiryas Joel (New York) | 2,413.81 mi (3,884.65 km) |
| Rancho Santa Margarita to Kissimmee (Florida) | 2,163.79 mi (3,482.29 km) |
| Rancho Santa Margarita to Klamath Falls (Oregon) | 635.30 mi (1,022.41 km) |
| Rancho Santa Margarita to Knightdale (North Carolina) | 2,211.19 mi (3,558.57 km) |
| Rancho Santa Margarita to Knik-Fairview (Alaska) | 2,388.03 mi (3,843.17 km) |
| Rancho Santa Margarita to Knoxville (Tennessee) | 1,906.50 mi (3,068.21 km) |
| Rancho Santa Margarita to Kokomo (Indiana) | 1,788.06 mi (2,877.60 km) |
| Rancho Santa Margarita to Kuna (Idaho) | 684.08 mi (1,100.92 km) |
| Rancho Santa Margarita to Kyle (Texas) | 1,182.48 mi (1,903.01 km) |
| Rancho Santa Margarita to La Cañada Flintridge (California) | 52.76 mi (84.90 km) |
