American Airlines has round-trip flights from San Antonio (SAT) to Los Angeles (LAX) for $139, NONSTOP. Flights August to December. Departures on Tuesday, Wednesday, and Saturday. Extended weekends available. Origin/Destination reversible. No Christmas dates available.
A Carry-on bag and also a personal item is allowed for free on American. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.