Travelers can choose from a number of easy check-in options with Frontier Airlines Atlanta Terminal. 24 hours before to your trip, you can check in online to select your seat, pay for your luggage, and print your boarding card. Terminal N has both manned check-in counters and self-service kiosks for passengers who would rather check in at the airport. It is advised to be at the airport two hours or more prior to your scheduled flight in order to guarantee a seamless check-in and security screening procedure. Head to the security checkpoint after checking in. Multiple security lanes are available at Terminal N to speed up the process. For expedited screening, a special lane is open to travelers who have signed up for TSA PreCheck. Make sure you are prepared to show security staff your ID and boarding pass.