<Page> 29 Exhibit 12 AMR CORPORATION Computation of Ratio of Earnings to Fixed Charges (in millions) <Table> <Caption> Three Months Ended March 31, 2003 2002 <s> <c> <c> Earnings (loss): Loss before income taxes and cumulative effect of accounting change $(1,043) $ (863) Add: Total fixed charges (per below) 438 440 Less: Interest capitalized 19 22 Total earnings (loss) before income taxes and cumulative effect of accounting change $ (624) $ (445) Fixed charges: Interest $ 183 $ 160 Portion of rental expense representative of the interest factor 244 272 Amortization of debt expense 11 8 Total fixed charges $ 438 $ 440 Coverage deficiency $ 1,062 $ 885 </Table> -27-