The daughter, Emily Cho, is the younger sister of another Korean Air executive whose onboard "nut rage" outburst delayed a flight in 2014.
The flag carrier said Cho, a senior vice president, was suspended from work starting today. It said it will take further action following the police investigation.
Cho allegedly hurled a cup of water at an ad agency official during a meeting last month. She later apologised on Facebook, saying the outburst was sparked by her passion for commercials.
Cho's sister, Hyun-ah, achieved worldwide notoriety after delaying a flight at JFK airport over the way nuts were served.
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