The United Explorer Card and the United Quest Card are both excellent choices for frequent United flyers. However, the United Explorer is the better card due to its lower annual fee and valuable perks, like free checked bags and United Club passes.
Nevertheless, the United Quest Card is a strong contender, offering higher rewards on United purchases and additional travel credits for those who fly United frequently and can leverage the extra benefits.
MoneyGeek's United card comparison breaks down the card details, rewards and perks to help you decide which is right for you.