Limited time only: Earn 25x AAdvantage miles on your donation to Stand Up To Cancer

When you donate $25 or more to Stand Up To Cancer (SU2C), you can earn 25 American AAdvantage miles per dollar. Plus, if you make your donation with a Mastercard, American Airlines will match your contribution — dollar for dollar — until the goal of $1 million is met, or by Sept. 18.

Since American launched its partnership with SU2C five years ago, the airline has helped raise over $10 million for more than a dozen types of cancer research and treatments through annual fundraising campaigns and efforts.

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Their special SUC2 livery, pictured below, features the names of 22,627 individuals who have battled cancer.

Related: American unveils Stand Up To Cancer, Marvel Avengers A321T livery

You can make a donation here, where you'll input your AAdvantage frequent flyer number, your first and last name and donation amount. The website will also tell you how many miles you'll earn with your donation with the current 25x promo.

For instance, a $500 donation to SU2C awards you 12,500 AAdvantage miles. Given TPG's latest valuations, those miles are worth $175 — a terrific return for your generous contribution to SU2C.

Note that bonus miles do not count toward elite status qualification.

The terms also state, "For charitable deduction purposes, each mile is valued at 3 cents per mile. The receipt of miles may reduce the tax-deductibility of your contribution."

Whatever amount you donate, 100% of it will go to SU2C, so earning 25x with a dollar-for-dollar match only sweetens the deal.

Donate here: Get 25 AAdvantage miles per dollar on your donation of $25 or more to Stand Up To Cancer, now until Sept. 18.