I think the OP is just wanting to put the travel expenses on a card that will give in 2x or 3x the points.
I would call Chase or AMEX and see what their policy is regarding this. You're probably going to have to wait until Tuesday, if they overnight it tomorrow. Is there any chance you could risk an extra day of your seats being available?
EDIT: I vaguely remember the banner ads on aa.com saying you can get $100 off your ticket if you apply and are approved. You might be able to pay using that card as well, worth a shot.