One popular strategy is known as credit card churning — opening and closing cards to earn sign-up bonuses and rewards.

It's a luxury card for those who fly frequently with Delta and can maximize the card's rich benefits. Those seeking a lower annual fee and more flexibility have other options.

Our opinions are our own. SOME CARD INFO MAY BE OUTDATED This page includes information about the Bank of America® Premium Rewards® credit card, currently unavailable on NerdWallet. The ...