After checking in, you’ll head through one of Denver Airport’s security screening areas. The lines can vary in length depending on the time of day, but DEN generally handles its passenger flow efficiently. Passengers with TSA PreCheck or CLEAR memberships can use the respective dedicated lanes for faster processing. Make sure to: Have your ID and boarding pass ready Remove la... https://airportsterminalhub.com/airlines/frontier-airlines/frontier-airlines-den-terminal-denver-international-airport/