Delta, United, and Alaska Airlines have round-trip flights from Los Angeles (LAX) to Austin (AUS) for $124, NONSTOP. Flights August to March. Weekends available. Origin/Destination reversible.
A Carry-on bag and also a personal item is allowed for free on Delta and Alaska Airlines. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
United’s “Basic Economy” fares do not allow for 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 Explorer credit-card, use the “free checked bag” perk.
The personal item size on United is smaller (9 x 10 x 17 inches) than Frontier or Spirit (8 x 13 x 18 inches).
Click for more details and booking links Nonstop Flights: Los Angeles to/from Austin $124 r/t [August-March] – Delta / United / Alaska Airlines