| Fallbrook to Kinston (North Carolina) | 2,250.33 mi (3,621.56 km) |
| Fallbrook to Kirkland (Washington) | 1,023.34 mi (1,646.90 km) |
| Fallbrook to Kirksville (Missouri) | 1,437.74 mi (2,313.82 km) |
| Fallbrook to Kirkwood (Missouri) | 1,535.52 mi (2,471.19 km) |
| Fallbrook to Kiryas Joel (New York) | 2,402.37 mi (3,866.24 km) |
| Fallbrook to Kissimmee (Florida) | 2,142.38 mi (3,447.83 km) |
| Fallbrook to Klamath Falls (Oregon) | 659.74 mi (1,061.76 km) |
| Fallbrook to Knightdale (North Carolina) | 2,195.25 mi (3,532.92 km) |
| Fallbrook to Knik-Fairview (Alaska) | 2,413.85 mi (3,884.72 km) |
| Fallbrook to Knoxville (Tennessee) | 1,890.32 mi (3,042.18 km) |
| Fallbrook to Kokomo (Indiana) | 1,776.15 mi (2,858.44 km) |
| Fallbrook to Kuna (Idaho) | 700.57 mi (1,127.47 km) |
| Fallbrook to Kyle (Texas) | 1,159.04 mi (1,865.30 km) |
| Fallbrook to La Cañada Flintridge (California) | 80.63 mi (129.76 km) |
| Fallbrook to La Crescenta-Montrose (California) | 83.15 mi (133.81 km) |
