United has round-trip flights from Houston (IAH) to Los Angeles (LAX) for $131, NONSTOP. August to December. No Friday departures. A few extended weekends available.
Note: This deal will probably not be worthwhile unless you can get around the carry-on bag fee with either Elite Status or their United MileagePlus credit-card. This city is put on sale often by Southwest and American, their fares includes free carry-on bag.
Note: United “Basic Economy” fares do not include a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding. If you have the United MileagePlus credit-card, use the “free checked bag” perk.
Note: The personal item size on United flights is smaller (9-in/10-in/17-in) than Frontier or Spirit (8-in/14-in/18-in).