United Airlines wrote -
Please join us to support Sandy relief.
We can all help support the American Red Cross in providing aid to those affected by Sandy. Join the relief efforts by donating to the American Red Cross, and we will reward your generosity by providing you with a one-time MileagePlus® mileage bonus. MileagePlus members who give $50-$99 USD will receive 250 bonus award miles, and those who contribute $100 USD or more will be rewarded with 500 bonus award miles. We are committed to awarding up to 5 million total MileagePlus miles to members for contributions made before November 30, 2012, to support this initiative.
MileagePlus members can also help by donating their miles to a charity through united.com. Visit united.com/charitymiles to provide a mileage donation today.