A portion of the Longacres complex in Renton which once served as the headquarters of Boeing Commercial Airplane will soon be repurposed as a training facility for employees of Alaska Airlines.

Alaska Airlines announced this week that it has paid $85.75 million to Unico Properties to acquire a 19-acre portion of Longacres, which spans 173 acres at 1901 Oakesdale Avenue S.W. Alaska plans to spend $100 million to upgrade an existing 600,000-square-foot building that Boeing previously built to house a training facility.

"Our remarkable operations team members will, for the first time in our history, all come together and train under one roof," said Alaska Airlines chief operating officer Constance von Muehlen in the announcement. "We're excited to build on Alaska Airlines' culture of safety, performance and care in this purposefully-designed space worthy of our frontline team's contributions to every guest and every flight."

Alaska Airlines was represented JLL senior managing director Kris Curtis in the transaction.

Alaska already houses nine full-motion flight simulators in the facility, and plans to add another in the coming years. The new space will also include a mock aircraft for inflight simulations, classrooms, an auditorium, and a production studio, and will be used to train flight attendants, pilots, customer service agents, and other employees.

Pilots already are training on the campus, and other employees are slated to move in following the completion of renovations in late 2025.

The Longacres campus, which is being repositioned as a mixed-use district near the Renton/Tukwila Sound Transit Station, has also welcomed a new practice facility for Sounders FC.