Recall that Starwood Preferred Guests can transfer up to 79,999 of their Starpoints per transaction per program within a 24-hour period to a variety of frequent flyer programs. And don’t forget, for every 20,000 Starpoints transferred within the same transaction, Starwood will automatically add another 5,000 Starpoints. This means that up to 94,999 Starpoints can be transferred into your frequent flyer account each day (20,000 + 5,000) X 3 which equals 75,000 + another 19,999 points.
American Airlines AAdvantage and Starwood Preferred Guest have teamed up to make this a sweeter transfer.
Through October 15, 2017, you can convert your Starpoints to AAdvantage miles and earn a 30% bonus on the amount of AAdvantage miles you receive from the conversion. You will earn a 20% bonus with each conversion and earn an additional 10,000 AAdvantage bonus miles for every 100,000 AAdvantage miles received from conversions
Note, unlike some of the other programs in which you can transfer points to airlines, points transfers through SPG are not instantaneous.