Do you need a state ID to fly? Is it ok if my friend fly with her benefit card with her picture an extra documents? We wanna make a trip soon.

Real I'D, or passport.

Yes you need state ID, but not just an ID it should be a real Real ID ( not the standard one) or passport. Benefit card is not accepted.

Well I believe if you going to travel to a international country you will need you passport otherwise you need some kind of identification

Good question