Adding TSA PreCheck to your Delta flights is a straightforward process that can significantly streamline your travel experience. How to Add TSA PreCheck to Delta TSA PreCheck is a trusted traveler program operated by the Transportation Security Administration (TSA) in the United States, designed to expedite the security screening process at airports. By enrolling in TSA PreCheck, travelers can enjoy benefits such as shorter security lines, keeping shoes and jackets on, and not having to remove laptops or liquids from carry-on bags.