Striking members of the Machinists union will vote today on whether to accept a contract offer from Boeing.
The Machinists have been on strike for eight weeks, cutting the airplane maker's profits and stalling jetliner deliveries.
The union represents about 27,000 workers at plants in Washington state, Oregon and Kansas.
The union has said the contract protects more than 5,000 factory jobs, prevents the outsourcing of certain positions and preserves health care benefits. It also promises pay increases over four years rather than three, as outlined in earlier offers.
The union members, including electricians, painters, mechanics and other production workers, have lost an average of about $7,000 in base pay since the strike began.
Boeing officials have said the contract allows them flexibility to manage their business and remain competitive.