Investors punished LUV for "slowed unit growth revenue."
Gary Kelly blames "unexpected drag" from the new reservation system and "items that we didn't anticipate our people having such difficulty with."
"The upgraded boarding product at the gate," he told CNBC, "is a little but more cumbersome to sell than the previous system." CEO anticipates improvement from the new system "by the end of next year."
Southwest Airlines Shares Sink on Unit Revenue Growth Concerns