According to the internet, San Diego PD charged her with felony battery.
If charged in state court, the penalty for felony battery in CA is up to 3 years in state prison.
In Federal court,
"49 U.S. Code § 46504. Interference with flight crew members and attendants
An individual on an aircraft in the special aircraft jurisdiction of the United States who, by assaulting or intimidating a flight crew member or flight attendant of the aircraft, interferes with the performance of the duties of the member or attendant or lessens the ability of the member or attendant to perform those duties, or attempts or conspires to do such an act, shall be fined under title 18, imprisoned for not more than 20 years, or both. However, if a dangerous weapon is used in assaulting or intimidating the member or attendant, the individual shall be imprisoned for any term of years or for life."
The "special aircraft jurisdiction" noted in the above statute is:
(a) any civil aircraft of the United States;
(b) any aircraft of the United States armed forces;
(c) any other aircraft in the United States;
I guess they added (c) to cover everything they missed in (a) or (b).
They probably won't go that route, unless there's some new AUSA looking to establish a reputation, but I'd be reluctant to put myself in that position just for the satisfaction of punching out some asshole.