Technically, yes, you can pay a credit card with another credit card. For instance, you can take out a cash advance with one credit card to pay off another one. However, this is typically not a good idea because of the costs associated with it. For one, cash advances have no grace period so you'll be paying interest straight away, and the APR tends to be higher than the regular purchase APR.Â
You can also pay the bill with a balance transfer, where you transfer your credit card balance to another card. There are also fees involved and other requirements, so check with your credit card before making any moves.