MEM-PHX. On AA you have three connecting options DFW,STL,ORD. A definite plus for you trip is you have TUS as a great back-up. Like Chris said its a little early to check availabily. Contact the forum again with a couple of flight options (early morning through DFW will probably give you the most flexibility) a little closer to your travel date and one of the AAers should be able to help you with loads.

Keep'em flying