United Airlines recently announced a new program to its frequent flyer rewards program that gives perks to customers who use its co-branded credit cards to make purchases. Under the program, customers will earn up to 3 miles per dollar spent on United-branded credit cards, with additional bonuses when using the cards to book flight tickets on the United website. Other perks include statement credits, flight discounts, and complimentary access to priority airport security lines. The program is designed to encourage customers to use their United-branded credit cards more often, and thereby increasing the airline’s future customer loyalty.