Wirelessly posted (BlackBerry8703e/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/104)
I think I recently read on FT that Southwest's conditions of carriage do not prohibit "hidden-city" ticketing. If that is true, you can try pricing one-way itineraries to a point beyond your intended destination (with a connection through your intended destination) to see if there are any deals. This might only work if you do not check baggage: I'm not sure if Southwest permits "short checking" of baggage.