Frontier passengers are encouraged to check in online or via the Frontier mobile app before heading to the airport. Doing so not only saves time but also helps you avoid long lines at the terminal. If you need to check a bag, there are self-service kiosks and staffed counters available at Terminal 5. Make sure to arrive at least two hours early for domestic flights to account for chec... https://airlinesofficesworld.com/frontier-airlines-lax-terminal-los-angeles-international-airport/