49 U.S.C. § 40127

1. (a)An air carrier or foreign air carrier may not subject a person in air transportation to discrimination on the basis of race, color, national origin, religion, sex, or ancestry.
2. (b)Notwithstanding any other provision of law, no State or local government may prohibit the use or full enjoyment of a private airport within its jurisdiction by any person on the basis of that person’s race, color, national origin, religion, sex, or ancestry.