The route you should take depends on the time of day, due to traffic issues. If Monday through Friday, 8am to 10am and 3 to 7pm, and if you are departing from the tree section, then I prefer my secret route. The fastest route might be to take Highland Blvd northbound, which merges with Vista Del Mar, turning right onto Imperial Highway, then left on Sepulveda. Please see map 1 below.
Otherwise, you should simply take Sepulveda northbound, under the tunnel, directly to LAX. See Map 2 below.
Manhattan beach is about 5 minutes from the Los Angeles International Airport. You donâ€™t even need to get on the freeway to get there. Just go south on Sepulveda, pass El Segundo and youâ€™re there.