AA is notoriously difficult to get hired onto from the street. Since you appear to be military that may improve your odds slightly. AA's philosophy going forward is built on the flow model whereby pilots from the wholly-owned regionals flow in a contractually obligated manner. That's the reason they hire very few off the street...just not a lot of slots left over after the flows. AA loves RJs and all the bickering that ensues between their regionals. They think it somehow fosters more competition on price even though it sacrifices service.

Delta's hiring over the last 2.5 years plus has been more balanced than in their past. They seem to see the benefits of all manners of pilot backgrounds, i.e. Military, civilian, corporate, cargo, et al. In the end it all comes down to your education, flight experience, college degree, and your overall body of work professionally and personally. Delta's stated goal is to reduce the number of RJs and thus increase more mainline growth.

All I really know of United is they are about to, if not already, cease running new hire classes for the remainder of the year. Reasons I've heard are reducing training costs for the fiscal year to an anticipation of a weakening domestic economy after the election. United appears to also be growing domestically but I'm not sure if that is to coincide with a decrease in RJs.

Additionally, everyone you speak to at these places will paint their own biased portrait of their life at their shop. I've been at Delta almost two years and despite the naysayers who are emotionally caught up in the contract debates our future is bright. Our focus right now is domestic growth so there will be some that say stay away because we don't have any real wide body growth for the foreseeable future. If you measure your career worth based on the size of your aircraft then they may have a valid point.