Southwest has round-trip flights from Houston (HOU) to Los Angeles (LAX) starting at $106, NONSTOP. $53 each-way. Flights August to October. Tuesdays and Wednesdays. Saturday departures are available +$5 more, but they have a stop. Origin/Destination reversible.
Note: United, Spirit, and Frontier may have fee encumbered “Basic Economy” fares available for a bit less. Keep in mind that those “cheaper” fares are often more expensive once you factor in bag fees.
Note: Southwest doesn’t charge a change-fee, so if you already booked this flight, but paid more, you should be able to re-book at the lower price and get the difference paid back to you in the form of a travel-voucher.
Note: You may find additional savings if you book your Flight+Hotel together as a package on Southwest Vacations.