Originally Posted by
Mike Jacoubowsky
What we saw might have been a "mistake" airfare on Delta that triggered an automatic match through UA computers. Somehow it got in underneath the trigger level that kicks it back for human intervention. As I understand it, DL pulled the "sale" early on, but it took "humans" at UA a bit of time to unravel the damage.
I like this theory, even though it's speculation. One clarification though -- it was actually all of the European Star Alliance. I saw the same $500 r/t base fare filed by AC, LH, LX, UA, OS, and SN.