If you are not driving, consider hiring a private car service for convenience and luxury. The estimated cost of hiring a private car service for this itinerary is around $300-$400 for the day. However, if you prefer public transportation, you can take the Metro Local Bus line 161 to the Getty Villa from Union Station in Downtown LA.
If you have more time, you might want to consider visiting the Getty Center, which offers some of the best art collections in the region, or take a hike in the nearby Santa Monica Mountains. If you have less time, consider removing the Calabasas Commons from your itinerary and spend more time at the other locations.
The nearest airport is Hollywood Burbank Airport (BUR), which is about 22 miles from Calabasas. Los Angeles International Airport (LAX) is further away, about 32 miles from the city center.