Yes, you can fly domestically with a passport instead of a REAL ID. Since May 7, 2025, the REAL ID Act requires that travelers have a REAL ID-compliant form of identification to board domestic flights, but a valid U.S. passport (either the passport book or passport card) is accepted as an alternative to the REAL ID at airport security. So, a passport remains a valid and accepted form of ID for domestic flights within the U.S. alongside the REAL ID.
