United has round-trip flights from Austin (AUS) to San Francisco (SFO) for $97-$140, NONSTOP. Flights January, February, May, and June. Departures on Wednesday, Friday, and Saturday. Very few weekends available.
Note: Cheapest flight is on Feb 29, returning Mar 03.
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).
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