The dismissals at the national carrier occurred late on Sunday after it was determined the employees were linked to a religious movement President Tayyip Erdogan has said attempted to overthrow the government on July 15, Sabah newspaper said.
An official at Turkish Airlines, Europe`s fourth-biggest carrier, declined to comment.
Other reports said the dismissals were due to "inefficiency." Thelira.com, a financial-news website, said about 250 cabin crew were dismissed, along with 100 management and administrative staff.
Aviation news site Airporthaber.com said that among those let go was a deputy chief executive responsible for the airline`s financial affairs.
Authorities have sacked, suspended or detained some 60,000 people, mainly public-sector employees, after a failed coup by a small faction in the military. They are accused of sympathizing or belonging to a religious group led by Fethullah Gulen, an Islamic preacher in self-imposed exile in the United States.
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