Southwest Airlines via DealBase discounts Southwest Airlines Spring 2018 1-Way Fares Nationwide with prices starting from $48.98. (On the DealBase landing page, click on "Southwest Airlines" in the top line to see this sale.) That's the lowest price we could find for select routes today by at least $91. Book this travel deal by August 31 for travel from April 8, 2018, through May 24, 2018.
All prices, dates, and booking details were valid at the time of publication.