(Reuters) - Budget airline Southwest Airlines Co <LUV.N> said it reached a tentative agreement with a union that represents the company's flight attendants.

The airline has not released any date for the ratification vote by the attendants, who rejected in July 2015 a tentative contract that would have raised wages but involved changes in work rules that many thought were burdensome.

The airline reached a tentative agreement with its pilot union last month.

(Reporting by Rachit Vats in Bengaluru; Editing by Don Sebastian)