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Save at least $24 on 200 routes nationwide. Buy Now at DealBase Tips On the DealBase landing page, click on "Southwest Airlines" in the top line to see this sale. We found this price on flights departing on February 19 from Nashville, TN (BNA) to Atlanta, GA (ATL). All prices, dates, and booking details were valid at the time of publication. Book this travel deal by January 23 for flights from January 28 through May 14.