Deal locks in historic gains in pay and benefits that are substantially higher than the troubled company offered before the strike began.

Striking workers at embattled plane maker Boeing voted Monday to accept the company’s most recent offer, ending the costliest strike in the United States in more than 25 years.

The approved contract offer includes a 38% raise over the next four years, a ratification bonus of $12,000 and expanded 401(k) contributions.