We have driven to Wichita and Dallas Love before for flights on Southwest that have been significantly cheaper for the same dates that OKC was offering. We don't fly American nearly as much, but for fun sometimes I will price out Lawton and Stillwater just to see if there is a "flash" price drop on a destination. Wichita is definitely easier to get to and closer by about an hour.

The free parking at SWO can add up in savings too for longer trips especially if you are flying international or a longer business trip and having to go through DFW anyways.