I'm going to disagree with BBB. US Air will go under before JetBlue - once that happens Jet Blue will grow even more. And if Untied goes the way of the Titanic, Jet Blue will be able to take advantage of the situation and rapidly expand. Whether or not SONG will work remains to be seen, the majors don't have such a good track record with starting up LCC's. Finally, Embraer is not going under so JetBlue will have much better maintenance support than ACA had with Dornier.