If Delta enters bankruptcy I don't think ticket holders have much to worry about. USAir went bankrupt a few years ago and the impact on ticket holders was nonexistent-to-rare. United Airlines entered bankruptcy a year or two ago (I think they’re actually still operating under bankruptcy) and again their financial problems didn’t impact ticket holders. This isn’t to say that if Delta goes bankrupt that ticket holders won’t be impacted; but I think it’s a long shot.
