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.

There is a 20% transfer bonus from American Express Membership Rewards to Hawaiian Airlines miles until June 23, 2014.

This can be a good way to top up your Hawaiian Miles balance if you've recently gotten The Hawaiian Airlines® World Elite MasterCard® with 35,000 bonus miles after spending $1,000 in the first 90 days.

Is this a good deal?

The newest Membership Rewards airline partner is Emirates Skyward miles.

American Express Membership Rewards transfers to British Airways will come with an automatic 20% transfer bonus from now through December 31, 2013.

It's transfer bonus season with Membership Rewards.

American Express Membership Rewards transfers to Virgin Atlantic will come with an automatic 30% transfer bonus from now through November 30, 2013.

Until October 15, you can convert 20,000 Starpoints to 31,125 Avios, a 56% transfer bonus.

Ordinarily 20,000 Starpoints transfer to 25,000 Avios, the same 5,000 mile bonus you get on every 20,000 Starpoints transferred to all 1:1 airline partners. Until October 15, British Airways is giving a 25% bonus on all incoming transfers of hotel points to Avios.