As you will see, there are many offers and promotions that will help you to
gain free airline miles for either doing nothing but registering, or by participating in offers for products or services.
Those who want to rack up as many
miles as they can in a specific program and
gain travel benefits such as
free checked bags and priority boarding should choose an
airline co-branded credit card such as the Chase United MileagePlus Explorer credit card or the Citi American
Airlines credit card.