It may not last forever, but for now the new Delta Digital ID speeds passengers through security faster than PreCheck or CLEAR—and it’s free to boot.

After successful beta testing in Detroit and Atlanta, the biometric program now has expanded to LAX, LGA and JFK, and since the program is so new, its dedicated security lines rarely have a wait.

Delta Digital ID lets customers quickly move through bag drop and security checkpoints without having to show photo ID to an agent. To register, travelers must have:

• TSA PreCheck® membership
• Their passport information and a Known Traveler Number stored in their Delta profile
• A (free) SkyMiles membership
• The Fly Delta app

Eligible customers will receive a notification in their Fly Delta app when traveling from a Digital ID-enabled airport, or can opt-in through their SkyMiles profile on Delta.com once the four requirements have been met.

They then can use the dedicated bag drop line – the one with the green “Delta Digital ID” icon – and security line.

Using Digital ID this week, I walked right through security behind just one other passenger at LGA, while my husband spent 10 minutes in the CLEAR line.