Actually, Butch, there ARE dry flights! US Airways is forbidden to sell alcoholic beverages on any flight to or from the State of New Mexico. It all stemmed from a case where a man got off a US Airways flight to Albuquerque and drove his vehicle the wrong way on I25 near Santa Fe killing 5 people and himself in a head-on collision. It was discovered that US Airways did not have a valid liquor license in New Mexico.
Story here.
The man obviously had a serious problem because he stopped at a store and purchased beer somewhere between the airport and the site of the crash.