If you don’t feel like driving, this is a pretty good price for a flight.
American Airlines has round-trip flights from Austin or San Antonio (AUS/SAT) to Dallas (DFW) for $97, NONSTOP. Flights November to February. Extended Weekends available. Origin/Destination reversible.
Note: Carry-on bag is allowed for free on American Airlines. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.