American Airlines brought back its 5@5 promotion where cocktails and beer are $5 on flights leaving from 5:00 to 6:00 p.m. The $2 discount on liquor and $1 discount on beer was popular when American did this last December, so they decided to bring it back. Select flights will have special margaritas all month as well in honor of last week's Cinco de Mayo. Would happy hour on a flight boost your spirits? We'd take the bait!