The problem might be is if his tickets are for a set time and flight. I was going to recommend Priceline where you can bid for a price on a flight, but it might not coincide with his flight, and I'm sure you don't want a 10 yo traveling alone.
don't know if Jet Blue flies from OKC, but they are having a sale now for $49 each way. But again he would have to be flying on that airline.
So I think your best bet might be cheaptickets.com where you could possibly match up his flight with yours. If you go to kayak.com, they give you hundreds of flights from all different airlines except SWA. And last but not least, once you know what airline your son is flying on, you might go to their site and see if they have any deals for that flight! Could happen!
