A bankruptcy judge on Wednesday approved two more concession agreements from Northwest Airlines employee unions, deals that could clear the way for nearly $750 million in cost savings from the carrier’s new labor pacts.

The flight attendants and flight simulator technicians were the last remaining groups that had not reached a deal to cut costs. Judge Allan Gropper’s acceptance of the motions is needed for the carrier to implement other concession deals with pilots, baggage handlers, and ground and clerical workers.