CHARLOTTE (TheStreet) -- Airline shares were surging Thursday because of strong December traffic results, even though the results benefited from unit revenue gains related to weather cancellations and the timing of the Thanksgiving holiday, and from favorable guidance from United (UAL).
In late morning trading, United shares were up 11%, American (AAL) shares were up 5% and Delta (DAL)was up 4%. United was gaining $4.35 to $45.36, while American was up $1.48 to $29.10 and Delta was up $1.12 to $30.92.
In its first traffic report following a merger with US Airways, American said December passenger revenue per available seat mile on pre-merger American rose 9% from the same month a year earlier on a capacity increase of 1.1%. PRASM on US Airways routes rose 12% on a capacity increase of 3.6%.
On Wednesday, United said its December PRASM rose between 11.5% and 12.5%, "greater than originally expected due to strong yields and traffic throughout the month." United noted that winter storms added about 2.5 points to its PRASM gain. Cancellations increased the passenger revenues on the flights that flew, and also United had a positive revenue impact from certain interline tickets.
On Wednesday, United issued fourth-quarter guidance that according to JP Morgan analyst Jamie Baker "paints a significantly better-than-expected outcome, affording the first tangible evidence of an improving margin deficit to the industry."
Baker said he now sees a fourth-quarter profit of 75 cents, compared to the consensus estimate of 4 cents. He said fourth-quarter cost per available seat mile was in line with previous guidance despite the bad weather. "We expect additional potential near-term upside on the heels of tonight's disclosure," Baker wrote late Wednesday.