Betty Ann Ong (traditional Chinese: ???; simplified Chinese: ???; pinyin: Dèng Yuèwei; February 5, 1956 – September 11, 2001) was an American flight attendant aboard American Airlines Flight 11, the first airplane to become hijacked during the September 11 attacks.
Shortly after the hijacking, Ong notified the American Airlines ground crew of the hijacking, staying on the telephone for 25 minutes and relaying vital information that eventually led to the closing of airspace by the FAA for the first time in United States history.