Quality and cash flow problems and DC-10 development costs, combined with shortages due to the Vietnam War, led Douglas to agree to a merger with McDonnell Aircraft Corporation to form McDonnell Douglas on April 28, 1967.
Problemas de calidade e liquidez e os custos de desenvolvemento do DC-10, xunto con escaseza por mor da guerra do Vietnam, levaron a Douglas a aceptar unha fusión con McDonnell Aircraft Corporation para formar McDonnell Douglas.