American spokesman Joshua Freed said Thursday that American's move to end the codeshare agreements won't impact its interline and frequent flyer program partnerships with Etihad and Qatar.
In Wednesday's statement, released by a communications firm for Qatar Airways, Al Baker said the remarks "were made informally at a private gala dinner, following comments about the Qatar Airways cabin service, and were in no way meant to cause offense".
Akbar Al Baker, the chief executive of Qatar Airlines, has apologized for calling USA flight attendants "grandmothers".
The proposed investment would not change American Airline's "board, governance, management or strategic direction", it said.
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The Forth Worth, Texas-based airline holding company attributed its decision to its disapproval of subsidies that the Middle East carriers receive from the Gulf states.
The signing event was attended by Qatar Airways Group Chief Executive His Excellency Mr. Akbar Al Baker and Hamad International Airport Chief Operating Officer Eng. Badr Al Meer, who were joined by a delegation of senior Qatar Airways management.
Etihad said it was "disappointed" with American's decision, describing it as "anti-competitive and anti-consumer".
The Middle Eastern carrier - which holds ten per cent of LATAM and a 20 per cent stake in British Airways-owner IAG - is seeking a ten per cent stake in its rival. The last valid date of travel using the codeshare will be March 24, 2018.
Qatar Airways and American Airlines are still partners in the OneWorld alliance. The Open Skies agreements provided a means to achieve similar results in the worldwide market by encouraging other governments to do the same. The Gulf carriers deny the allegation.