FILE PHOTO: A worker holds a picket sign, as people protest during a walkout by members of the International Association of Machinists and Aerospace Workers (IAM) over contract negotiations, outside Boeing company's facility, in Berkeley, Missouri, U.S., August 4, 2025 REUTERS/Lawrence Bryant/File Photo

By Dan Catchpole

(Reuters) - Boeing Defense and the machinists union have reached a tentative deal to end a five-week-long strike in the St. Louis area, union officials announced on Wednesday.

A vote on Boeing's five-year contract offer is scheduled for Friday, according to the International Association of Machinists and Aerospace Workers.

IAM District 837's roughly 3,200 members, who assemble Boeing fighter jets, went on strike on August 4 after voting 67% to reject the company's last contract proposal.

“We’ve found a path forward on a five-year contract offer that grows wages by 45% on average," Boeing Defense Vice President Dan Gillian said in a statement. "It remains the best deal we’ve ever offered to IAM 837, and we encourage our team to vote yes so we can get back to work building amazing products for our customers.”

The deal includes a 24% general wage increase over five years and a $4,000 ratification bonus, among other terms.

The previous offer was for four years and included a 20% wage increase and a $5,000 bonus. The deal would have raised compensation by 40% on average, according to the company.

"They didn't really offer more, they just extended it another year," said IAM member Brandon Thiel, who works on the F-15 program.

Thiel said he did not know how he will vote, but "I have a strong inclination that it will not pass."

His raises during his seven years at Boeing have been almost entirely offset by rising living costs, he said.

"We just want to be comfortable, to not stress out on a daily basis," he said.

A seven-week strike by IAM District 751 members in Washington and Oregon ended with a contract that included a 38% wage increase and a $12,000 signing bonus.

Contract negotiations with a federal mediator ended Tuesday afternoon without any progress. Boeing and the IAM resumed discussion later that day, which continued into Wednesday and led to the latest proposal, he said.

If the contract is approved, workers would start returning Monday evening, and production would be back to normal in about a week, Gillian told reporters on Wednesday.

Non-union employees have kept production going during the strike, though output has slowed on some programs, he said last week.

On September 4, Boeing announced plans to hire replacement workers.

Boeing’s offer assures workers another year of raises, even for employees already at the top of the pay scale, Gillian said. "So, I feel good about the offer."

(Reporting by Dan Catchpole in Seattle; Editing by Franklin Paul, Marguerita Choy and Sonali Paul)