Any website with DING historical info OTHER than to MCO??

[pjlla]

I am trying to get an idea of when/where I might get a good DING airfare for my Mother/Daughter weekend this year. I have in mind that we might try to fly to San Antonio and go to SeaWorld. But I have a limited budget and not sure if I am waiting in vain if I keep waiting for a DING that might never come. SO my question is.... is there a website anywhere that tracks historical DING dates and prices?? Thanks in advance.................P