Where do LAX commercial cargo planes land/take off?
Large airports like LAX see hundreds of planes departing or arriving every day. They manage traffic flow in the entire area (class Bravo airspace) to optimize their traffic. Cargo aircraft will be treated just like any other aircraft. Which runways are in use for departures and which ones for arrivals, depends on the current winds and preferred configurations of the airport. Due to the high traffic, the airport will not deviate from this configuration to accommodate a single cargo aircraft, which would then be closer to its cargo area. Cargo aircraft will then taxi to their respective cargo areas just like passenger aircraft taxi to their gate on the ground.