As of February 2026, the most critical TSA rule is the full enforcement of REAL ID; you must have a REAL ID-compliant license or a valid passport for domestic flights, or you may face a noncompliance fee or be denied boarding. The "3-1-1" liquid rule still applies (3.4oz containers in one quart-sized bag), though many airports with new CT scanners now allow you to keep liquids and laptops inside your bag. In 2026, many passengers can keep their shoes on thanks to modernized screening lanes, but you should always follow the specific instructions of the officer on duty. TSA PreCheck remains the "gold standard" for a faster experience, typically allowing you to bypass the need to remove belts, light jackets, and electronics, with most lines moving in under 10 minutes.