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Until July 31, 2014, you can transfer 20,000 SPG Starpoints to 30,000 American Airlines AAdvantage miles.

It’s July 2nd, and I think we can probably declare this the best miles deal July will see!

• How many Starpoints can you transfer?
• Do Starpoints transfer instantly to American Airlines miles?
• In what increment must you transfer Starpoints to maximize this deal?

“From July 1 through July 31, 2014, simply convert your Starpoints^® to American Airlines AAdvantage miles and earn a 20% bonus. As always, for every 20,000 Starpoints transferred within the same transaction, SPG^® will automatically add another 5,000 miles. With the additional 20% mileage bonus offered by the AAdvantage program, you will receive a total of 30,000 miles from the transaction.”

• 20,000 Starpoints = 20,000 AAdvantage miles (1:1 transfer partner)
•  Standard SPG bonus = 5,000 AAdvantage miles per 20,000 Starpoints transferred
• AAdvantage 20% mileage bonus = 5,000 AAdvantage miles
• Total: 20,000 Starpoints = 30,000 AAdvantage miles

You can transfer up to 79,999 Starpoints per 24 hours to an airline. Since you need to send Starpoints in 20k point increments to maximize transfer bonuses, the effective limit is 60,000 Starpoints per day to 90,000 American Airlines miles.

Starpoints do not transfer instantly to American Airlines miles. The transfer usually take 2-4 days in my experience.

Other than the daily limit, there is no limit to the number of Starpoints you can transfer to American Airlines miles during this promotion.

Terms and Conditions

AAdvantage Bonus Mile Offer Terms and Conditions
To qualify for this AAdvantage bonus mile offer, member must initiate the AAdvantage mileage conversions with the Starwood Preferred Guest^® program between 12:00 a.m. CT July 1, 2014, and 11:59 p.m. CT July 31, 2014, (the “Promotion Period”), and be in good standing in the AAdvantage program. Members can convert multiple times during the Promotion Period.

To earn the 20% conversion bonus, member must convert points from the Starwood Preferred Guest program. This offer is non-transferable and non-reversible.

Bonus miles will be posted by American Airlines to the qualifying AAdvantage member’s account within seven business days after the initial conversion activity has been posted by Starwood Preferred Guest. Bonus miles earned in this promotion do not count toward elite status qualification.

American Airlines, AAdvantage, the Flight Symbol logo and MileSAAver are marks of American Airlines, Inc.

Starwood Guest Preferred Transfer to Miles Terms and Conditions
Starwood Preferred Guests can transfer up to 79,999 of their Starpoints per transaction per program within a 24-hour period to the American Airlines AAdvantage program. Plus, 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 AAdvantage account.

There is no minimum Starpoint transfer requirement for Platinum Preferred Guest members. Gold Preferred Guest members have a minimum transfer requirement of 1,500 Starpoints, and Preferred Guest members have a minimum transfer requirement of 2,500 Starpoints.

Transfer maximums are based on a combination of member Starpoints and the Starwood Preferred Guest airline transfer transaction bonus. Only one airline transfer transaction per member per 24-hour period is allowed; multiple transfer transactions within the same 24-hour period will reject. Both the Starwood Preferred Guest and AAdvantage account must have identical member names in order to complete this request; different names will cause the transfer to reject. Airline transfers are one-way, non-reversible and non-refundable.

Starwood Preferred Guest and Starpoints are marks of Starwood Hotels & Resort Worldwide, Inc.