"We mourn the passing of Bette Nash, who spent nearly seven decades warmly caring for our customers in the air," American Airlines, for whom she used to work, wrote in a statement on X on Sunday.
"She started in 1957 and held the Guinness World Record for longest-serving flight attendant. Bette inspired generations of flight attendants. Fly high, Bette."
She served until this year for nearly 67 years.
She initially worked as a flight attendant for Eastern Airlines, which later became American Airlines.
Passengers who flew with her also mourned on social media.
"Fly high Bette! It was a pleasure being your passenger," Jon Kruse wrote on X.
Another wrote: "We will miss you deeply! It was a pleasure flying with you, Bette. Rest in peace."