Reply #41: "race, color, religion, sex, or national origin" -- that's all Title II of the CRA 1964 covers

[X_Digger]

There is no general 'civil rights' protection law with regards to private property.

Nor is a lunch counter, hotel, or other 'public accommodation' required to respect your other rights that would apply in public.

You can be kicked out of a restaurant for handing out political flyers, proselytizing your religion, etc.

You can be detained at a store until the police arrive if they think you've shoplifted. In certain stores, you more or less sign away your right to privacy when you join (costco, etc).

Airlines are private property, even if the government "secures" some of them. Government securing airports is actually voluntary in exchange for being part of the federal airline safety compact (iirc).