What was shaping up to be the summer of the airline merger is now dead. US Airways and United announced that they have decided that now is not a great time to merge. Surprisingly (at least to me, and what do I know?) United was the company to call off further discussions. It looks like Delta/NW will be the only pairup before the Bush administration’s laissez-faire antitrust policies disappear (depending on who wins in November, of course).