I thought it was just me but even with just a couple of levels deep, its not the easiest to find what's available.

My thoughts:
- Move all of the links to the top of the first page (this includes the Aadvantage subpage).
- Move the discounts information to a "Discounts" page.
- Move the current information at the top of the page to a "Basics" page or at the bottom.
- Maybe group the information as AA.com does their customer service e-mail form: 1) "Prior to Travelling" (Reservations/Ticketing, Fares/Schedules, 2) "As I Checked in at the airport" (Baggage, Ticketing/Boarding, etc), 3) "During My Flight", 4) "At My Airport Destination", 5) Other.

Last but not least, a FAQ section with links to the appropriate sections.