(Reuters) - U.S. budget airline Southwest Airlines Co said on Monday that its flight attendants union voted to ratify a tentative agreement that the parties had reached in September.
The agreement includes a ratification bonus and annual wage rate increases over the life of the contract, the airline said in a statement.
Southwest Airlines said the new contract would become amendable on Nov. 1, 2018.
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The discussion between Southwest and the union, which represents more than 14,500 Southwest flight attendants, started in 2013.
The union had in July 2015 rejected a tentative contract that would have raised wages, but involved changes in work rules that many thought were burdensome.
Southwest Airlines' shares were up about 2 percent at their session highs in late afternoon trading on the New York Stock Exchange.
(Reporting by Arunima Banerjee in Bengaluru; Editing by Savio D'Souza)