Frontier has round-trip flights from Austin (AUS) to Ontario (ONT) for $77, NONSTOP. Flights August to November. Departures on Tuesday, Thursday, and Saturday. Extended Weekends available. Origin/Destination reversible.
Note: Ontario, California is about an hour from downtown Los Angeles.
Note: Frontier fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.
Note: Frontier flights only have 28-inches of pitch; 2-to-3 inches less space than most other airlines.
Click for more details and booking links Nonstop Flights: Austin to/from Ontario, California $77 r/t – Frontier