i have a 9:20pm flight on delta. what time do i need to be at the flyaway

You should always arrive at the airport 3 hrs. before an International flight and 2 hrs. before a Domestic flight. Assuming this is an International flight, you will need to arrive at the Flyaway at 5:15 so you can take the 5:30 bus (buses run every 30 minutes). The bus takes about 45 minutes to get to LAX so you should arrive at LAX around, 6:15, which would be perfect since you should arrive there by 6:20 for an International flight. If you are flying Domestic, then just shave off an hour.

6pm.specially if it's an international flight

6:20 pm