Alaska Airlines' corporate headquarters, the main Seattle-area office, is located at 19300 International Blvd, SeaTac, WA 98188, near the airport, handling corporate and operational roles. While there isn't a public-facing "office" for general inquiries (use the website or customer service), this is the central hub for their business operations in the Seattle area, open weekdays.
Address: 19300 International Blvd, SeaTac, WA 98188
Location: Near Seattle-Tacoma International Airport (Sea-Tac)
Function: Corporate Headquarters for Alaska Air Group
Hours: Generally Monday-Friday, 8:00 am - 5:00 pm (corporate, not public-facing)