Two weeks from now? They have almost always charged more for short term planning, with some exceptions for empty planes that had to go anyway - but sales on those are rare. Why such late planning? Trips in the $700s start a week later, and I see $555 on December 1.
Many like to plan far in advance, like I want to book tickets to Yellowstone for next August as soon as I find a good deal, but they airline generally charge more on advance planning hoping we'll give in - lowering fares usually 3-8 weeks in advance.
You can get $689 from Greenville into & out of (GSP) for those dates, reasonable flights on United. Originating ATL, you can get Cancun much cheaper.
It would be difficult be catch an 8am flight out of Cancun, but doable and non-stop service...!
Or this may be better...
I agree with the other DD. IT is best to start looking 2 months out, that is when the airlines start getting desperate—we hope!
Dave Dillehay
Aldora Divers