Today, Fool analysts Brendan and Austin discuss the increasingly attractive airline industry. But with US Airways up more than 100% in 2012, and Delta and United having a nice run as well, it looks like the industry might be peaking. The factors that generated profit earlier this year -- low commodity prices and high demand for summer travel -- are slowly eroding, and the long-term outlook for the industry remains bleak.

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Austin Smith, Brendan Byrnes, and The Motley Fool has no positions in the stocks mentioned above. Motley Fool newsletter services recommend Southwest Airlines. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.