United joins JetBlue and Southwest as the three U.S.-based Chase Sapphire airline partners. MileagePlus miles are worth around 1.2 cents per mile when redeemed for United economy flights. In addition to redeeming miles on United, you can redeem United MileagePlus miles for award flights on other Star Alliance partners.

The Chase Sapphire Preferred® card does not belong to a single airline; instead, it utilizes a "transferable points" system through Chase Ultimate Rewards®. In 2026, you can transfer points at a 1:1 ratio to several major airline partners, including United MileagePlus, Southwest Rapid Rewards, JetBlue TrueBlue, and British Airways Executive Club. Other notable partners include Air Canada Aeroplan, Singapore Airlines KrisFlyer, and Virgin Atlantic Flying Club. This flexibility allows cardholders to book flights across all three major global alliances (Star Alliance, SkyTeam, and Oneworld). Additionally, you can book any airline—such as American, Delta, or Emirates—directly through the Chase Travel Portal, where your points are worth a fixed 1.25 cents each toward the cash price of the ticket.