If not, you can Uber to LAX. Leaving a car parked there cost daily, and a lot of friends and relatives prefer not to drive there to drop off.
International flights are only from Lax(Los Angeles Airport). But if you need to fly from Ontario there is connecting flight that will take you to LAX. There is restriction with luggage but with international tickets they take you according the tickets requirements. Hope it helps.
Not that I know of (unlikely direct flights), Los Angles would be your best bet.
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