Delta Air Lines Inc. late Wednesday received court approval to provide a severance package to its senior managers, adding tension to a dispute between the airline and its pilots union.

The Atlanta-based airline had requested the severance to stem the departure of key executives, saying it lost at least six key employees in recent months. But the Air Line Pilots Association objected to the plan and warned the action would likely make it more difficult for Delta to obtain the concessions it seeks from its pilots.