American Airlines flight attendants will receive an additional 1.6-percent pay raise instead of a more than 8-percent pay hike sought by their union, an arbitration panel has ruled.

The panel on Tuesday agreed on the lower figure for American’s more than 25,000 workers represented by the Association of Professional Flight Attendants.

Fort Worth-based American (Nasdaq: AAL) disagreed with the union over the wage increase as part of a pay adjustment negotiated in a 2014 collective bargaining agreement…