Not from the Van Nuys terminal, no. Actually, BUR isn't far and you'd probably be better off calling an Uber or Lyft.
Amtrak stops at BUR too.
Metrolink will take you from BUR to LA Union Station from which you can catch a Flyaway bus to LAX. NO direct BUR-LAX service via Flyaway.
No
No, but you can take the metro. It drops you 200m from the departure/arrival area
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