From Airline Weekly (bolding mine), discussing why United's third quarter profit margins were slimmer than expected:
Why is United stumbling, despite
a backdrop of strong demand
and economic growth?
There’s blame to go around: its
overexposure to troubled Asian
markets, its underexposure to
lucrative domestic markets, bruising
battles with ultra-LCCs, costly
missteps in its basic economy
rollout, a suboptimal credit card
partnership and damage from a
hurricane that hit its Houston hub.