Why not just buy T+ for now and pay a change fee ($100 I think for Int'l) at the airport if you need to rebook?
Clarification: The $100 is for same day, but I would suggest that unless loads are really heavy, you may be able to rebook a few days ahead for roughly the same as what you would be paying now for Latitude.
Last edited by YQMer; Apr 11, 2010 at 5:31 am
Reason: Clarification