I have 1) an AA voucher, 2) $150 statement credit from Citi AA card if I buy a ticket from AA, 3) a few AA gift cards.

The way they are listed above is my preferred order of usage, because: The voucher expires Feb 2013 so I'd want to use it first (although I am aware of the buying a refundable ticket route). The Citi AA statement credit expires a year from when I applied for the card, so I have almost a year from now. Since AA gift cards don't expire, I'd use the gift cards last. (Does this reasoning sound right?)

Can I use all three in the same purchase? If not, in what combinations can I combine these three? Thanks!