SFO Terminal 3 West Modernization slated for fall 2027; United holds 48% market share

United Airlines has operated a fortress hub at San Francisco International Airport since 1985 after acquiring Pan American World Airways' Pacific Division, and it now holds roughly 48% of the airport's total market share, a 42% lead over Delta's 7.6% share.

Turner Construction is the official contractor for the new terminal renovation and expansion project that began in 2024, with Magnusson Klemencic Associates serving as the primary structural engineer; the $2.6 billion Terminal 3 West Modernization is being funded by the airport through revenues, bonds and capital mechanisms and is scheduled to be completed sometime in the fall of 2027, and the finished terminal will include a seismic retrofit, an expanded security checkpoint, new passenger amenities and 200,000 square feet of additional space for food, beverage and retail concessions.