Unless you happen to sign a paper (usually with the very fine print at the bottom making it legal) it is very illegal for any company to check your credit report prior to employment. In addition the big three credit agencies have admitted time and again that inaccuracies on credit reports are widespread. Being turned down for any job because of a marginal credit report is very much a grey area and could open up said company to numerous lawsuits. Credit report is the LAST thing I'd worry about at an airline interview.