Originally Posted by
MSPeconomist
There was a time when only interstate flights were regulated, by CAB then. Flights within CA and TX in particular were very different and much cheaper. So I would think (but IANAL) that federal jurisdiction wouldn't cover intrastate flights, unless the government tries to make an argument that drinking by under 21s poses a threat or a safety hazard on aircraft.
Sill, I can't imagine a USA airline that would be eager to willingly and knowingly serve or sell alcohol to under 21s if no other carrier does it. Why take on liability issues unnecessarily?
US Airways has also served me, and that was on a CRJ that took cash only. Since states aren't in charge of airspace, I don't see how they can apply their laws to aircraft in flight. They could theoretically say something about PDB service, however.