How to book American Airlines flights with Chase Ultimate Rewards points

American Airlines AAdvantage miles aren't the easiest rewards to earn. The airline program is only a transfer partner of one major transferable credit card program: Citi ThankYou Rewards.Even though AAdvantage isn't a direct transfer partner of most issuers, including Chase Ultimate Rewards, that doesn't mean you can't redeem your hard-earned Chase points for American Airlines flights.Here's how to do it.Transfer Chase points to Oneworld partners to book American Airlines flightsAmerican Airlines is a member of the Oneworld alliance, and multiple Oneworld airline programs are transfer partners of Chase Ultimate Rewards. This means you can transfer Chase points to one of these partner programs at a 1:1 ratio and use them to book American Airlines-operated flights.There are three Avios-based airline loyalty programs that are Chase Ultimate Rewards transfer partners and can be used to book American Airlines award flights: Aer Lingus AerClub, British Airways Club and Iberia Club.These airlines use Avios as their loyalty currency. However, each program may offer different award rates, taxes and fees, and availability for the same American Airlines flight, so it's worth checking each one...