Dallas, TX-Based Southwest Air 4Q 2017 Net Income Was $1,888 Mil, Up 262%, or Up $1,366 Mil From the 4Q 2016 Net Income of $522 Mil ...................................................................................... The Trump Tax Bill’s Forgiveness of Existing Southwest Air’s Tax Debt, Which Was Funded Completely By US Taxpayers, Increased Southwest Air’s 4Q 2017 Net Income By $1,410 Mil, or Comprised 103% of the $1,366 Mil 4Q 2017 Net Income Increase