Air China and Singapore Airlines signed a Memorandum of Understanding on 29 June 2026 to establish a commercial joint venture partnership, deepening their Star Alliance collaboration. The MoU expands their 2016 codeshare beyond Singapore–Beijing, Chengdu, Chongqing, and Shanghai to additional routes between Singapore and mainland China, domestic Chinese connections, and onward destinations. Operators will coordinate flight schedules, develop joint fare products, pursue joint marketing and revenue-sharing, and integrate PhoenixMiles and KrisFlyer frequent flyer programs for cross-airline mile earning and redemption. All initiatives require regulatory approval; the MoU serves as the foundational step toward a full joint venture that could reshape route coordination and revenue models between these major Asian hubs.