Southwest and American have round-trip flights to various destinations in the USA at a discount today for $74-$190, Nonstop or with a connection. Dates vary, use the linked calendar. Cheapest fares are mostly midweek. Most fares are reversible.
Notes: Most destinations have flights from August to December available. The exact ranges for each destination will vary. Use the Google calendar view to get an idea of what dates work.
Flights to smaller airports may require a long connection or two stops. When you begin your search, modify your filter to remove fares that have more than one connection, some of those smaller airports ONLY have flights with bad routing.
There is a good chance that other airlines will match these fares.
Click for more details and booking links Domestic Airfare Sale: Austin or San Antonio to/from various destinations in the USA $74-$190 r/t (New York, Los Angeles, Seattle, Miami, + more) [mostly Aug-Dec] – Southwest / American / United