United Credit Cards from Chase
The following United Airlines co-branded credit cards all offer benefits like free checked bags, priority boarding, and expanded saver award availability.
The Club Card, by contrast, caries a $450 annual fee, though it does come with United Club membership.
Many people would likely do better with a Credit Card That Earns Chase Ultimate Rewards Points, which are generally earned at a faster rate and can be transfered to United 1:1 (as well as a range of other transfer partners). Note that you would need one of the Chase cards with an annual fee, like the Chase Sapphire Preferred, the Chase Sapphire Reserve, or the Chase Ink Business Preferred in order to be able to transfer the points.
The main reason to get the United cards would be if you travel with United a few times a year and check bags, meaning that you will save more on the free checked bags than you pay in annual fees, or if you value the expanded saver award availability.