In the current session, the stock is trading at $112.99, after a 0.45% spike. Over the past month, United Airlines Holdings Inc. (NASDAQ:UAL) stock increased by 23.40%, and in the past year, by 17.94%. With performance like this, long-term shareholders are optimistic but others are more likely to look into the price-to-earnings ratio to see if the stock might be overvalued.Evaluating United Airlines Holdings P/E in Comparison to Its PeersThe P/E ratio is used by long-term shareholders to assess the company' ...