Save up to $32 on 200 routes through March 2020. Buy Now at DealBase Tips On the DealBase landing page, click "Southwest Airlines" in the top line to see this sale; we found lower rates within. We found this price on flights departing from Atlanta, GA (ATL) with arrival in Nashville, TN (BNA) on November 20. All prices, dates, and booking details were valid at the time of publication. Book this travel deal by October 31 for travel from November 12 through March 5.