United Airlines announced it will extend the availability of Mileage Plus Transfer Miles through March 31. The program allows members to transfer existing miles into another member’s account.

Members can transfer miles to up to three different Mileage Plus accounts at one time for a fee. The fee structure is $0.01 per mile plus tax and a $25 processing fee. Miles may be transferred in 1,000-mile increments with a minimum transaction of 5,000 miles. Members may transfer a maximum of 15,000 miles to a single Mileage Plus member and up to a total of 60,000 miles from a single account. Miles will be posted to the receiving account within seven business days.

For more information or to transfer miles, visit http://www.united.com/transfermiles.

Members can also purchase up to 25,000 miles per calendar year for their own account or as a gift to a friend or family member. When purchasing 5,000 miles or less, the cost is $0.0275 per mile plus tax. Purchases of more than 5,000 miles will cost $0.0250 per mile plus tax. Again, a $25 processing fee applies to each transaction. Miles will be posted to the receiving account within three business days.

For more information on Mileage Plus Purchase Miles, visit http://www.united.com/purchasemiles.