The parent of United Airlines posted a big loss for the quarter as it dealt with higher fuel prices and expenses from integrating with Continental Airlines.

The company lost $448 million, or $1.36 per share. That's twice as big as its loss during the same period last year.

Not counting integration costs, it would have lost $286 million, or 87 cents per share. Analysts surveyed by FactSet expected a loss of $1.12 per share.

Revenue rose 4.9 percent to $8.6 billion, which is what analysts forecast.

United Continental Holdings Inc.. President and CEO Jeff Smisek called it a "difficult quarter" and says things should get better now that so much of the integration is done.

United recently switched two important computer systems that hurt its performance.