http://www.nwa.com/corpinfo/aircares/donate/

Northwest Airlines is also (and before United):
Northwest WorldPerks® members who contribute at least $50 to our AirCares charity partners [Long list: http://www.nwa.com/corpinfo/aircares/partners/ ]will receive 500 WorldPerks Bonus Miles. To make a monetary contribution, you may contact most organizations directly and mention the Northwest AirCares program (please be sure to include your WorldPerks number in order to receive the Bonus Miles). If an organization is unable to assist you in recording your WorldPerks number for proper Bonus Mile credit, please save your receipt and contact AirCares at the address below.

To make a mileage donation, simply call toll-free at 800-327-2881. Minimum donation is 5,000 miles; larger donations may be made in 1,000-mile increments. All donations are final.

Northwest Airlines welcomes inquiries about our AirCares Program. For more information write us at e-mail address [email protected] or by U.S. Mail at:
Northwest Airlines
Dept. A1305
2700 Lone Oak Parkway
Eagan, MN 55121