Southwest has round-trip flights from Los Angeles (LAX) to Phoenix or Tulsa (PHX/TUL) for $118, NONSTOP. $59 each-way. Flights between February to July. No Holidays. Mostly on Tuesdays, Wednesdays, and Saturdays. Origin/Destination reversible.
Note: You can save up to an additional $150 if you purchase your Flight+Hotel together as a package on Southwest Vacations and use the US150OFF coupon code. Before you commit, always compare the prices of the individual Flights and Hotel with other hotel booking sites like Expedia or Tripadvisor.