Airline CEOs talked a lot about the weather and its impact on their bottom lines at today's JPMorgan investor conference. The brutal cold snap caused thousands of flight cancellations in the first quarter. That said, it hasn't grounded airline stocks which continue to remain aloft. The flight cancellations boosted unit revenue, Wall Street's favorite metric, as more travelers were put on remaining flights. UAL CFO John Rainey told the crowd the carrier is even considering paying a dividend.