Advantage is American Airlines‚ frequent flyer program and is also a member of Oneworld. That’s why AAdvantage allows you to earn miles on all Oneworld flights. You can also take advantage of your status benefits, and book award flights with AAdvantage award miles.
One great benefit of AAdvantage is that miles expire 18 months after the last activity (at least one mile earned or redeemed). This means that if you use AAdvantage regularly, your miles will almost never expire. Sometimes you can get free miles for playing a little game or watching a video.