Flight attendants at JetBlue Airways (NASDAQ: JBLU) have rejected a tentative contract agreement forged between the airline and union leaders, adding an additional layer of uncertainty at a time when the airline is already dealing with a pandemic-related slowdown. The airline's flight attendants voted to unionize in April 2018, and the company and the Transport Workers Union (TWU) have been in talks about a contract. "We are disappointed in the results of the vote," Ian Deason, JetBlue's head of customer experience, said in a statement.