Like all LAX terminals, Terminal 5 has its own TSA security checkpoint. Depending on the time of day and season, lines can be long, so it’s best to arrive at least two hours early. If you have TSA PreCheck, there’s a separate, expedited security lane available in this terminal. Once through security, keep an eye on gate information. Frontier often boards by zones and uses a streamlined boarding process. Make sure to listen carefully to announcements and be at your gate at least 30 minutes before departure, as gates can close early. https://airlinesofficesworld.com/frontier-airlines-lax-terminal-los-angeles-international-airport/