IAM said 59% of the striking workers voted in favour of the new deal, which also includes a one-off $12,000 (£9,300) bonus, as well as changes to workers’ retirement plans.
“Through this victory and the strike that made it possible, IAM members have taken a stand for respect and fair wages in the workplace,” union leader Jon Holden said as he announced the results of the ballot.
The union had previously called for a 40% pay increase and workers had rejected two previous offers from the company.
“While the past few months have been difficult for all of us, we are all part of the same team,” said Kelly Ortberg, Boeing’s chief executive.
“There is much work ahead to return to the excellence that made Boeing an iconic company.”
Last month, acting US Labor Secretary Julie Su flew to Seattle and to help with the negotiations, in a sign of how seriously the White House was taking the strike at one of the country’s most important companies.
