That means round-trip fares are under $100 before taxes.
The sale will span a total of three days starting early Tuesday.
In addition, all Friday and Sunday flights are excluded from the sale. The Dallas, Texas-based airline is known to offer massive fare sales several times every year. Southwest Airlines' 72-hour sale is underway, offering discounted flights to a number of destinations.
Finding the lowest prices might take some hunting and flexibility with your travel plans, including departing on a Wednesday or Thursday or returning on a Monday or Tuesday, can increase your chances of landing a deal. Travel from Florida and Nevada and from Nevada to Florida is valid only on Tuesdays through Fridays.
The deals are for specific dates and there are a handful of restrictions.
Domestic destinations featured in the fare sale include Atlanta, Georgia; Austin, Texas, Dallas, Texas; Baltimore, Maryland; New York, New York; Boston, Massachusetts; Chicago, Illinois, and many more.