You would think that record high energy prices would have a major negative impact on airline stocks. Today, however, the AMEX Airline Index (XAL) is holding up pretty well, adding more than 1.5% on the session so far. So why the friendly skies? A report arrived from the Bureau of Transportation Statistics today stating that U.S. airline load factors reached a record high in June, as higher ticket sales and trimmed capacity growth resulted in fuller planes. June's load factor jumped to 85.8%, topping the previous high set in July 2006. Load factor for domestic flights reached 86.4%. During the first half of the year, U.S. airlines carried 379.5 million scheduled domestic and international passengers, 2.7% more than the year-ago period.