There are
1,617 mi
from Lake Forest, CA to Leavenworth, KS
That's the driving distance. It would take 1 day 4 hours to go from Lake Forest, California to Leavenworth, Kansas.
The flight distance (direct flight from Lake Forest, CA to Leavenworth, KS) is 1,319.84 mi.
1,617 mi = 1.61 kms