Usually, no — at least not directly. Most credit card companies won't allow you to punch in the numbers for another credit card to pay your bill. The main reason why it's typically not an option is that the processing fees are too high for the company. However, if the due date on your credit card bill is fast-approaching and you don't have the cash, you can find another way to use a second credit card or try another approach.
Cash Advances
If you have a second credit card, you can take a cash advance against it to pay off the first credit card, or at least pay the monthly bill. You can then deposit the cash into your bank account and make your payment. However, there is a drawback to cash advances: the fees. It's not uncommon for a fee to be 5 percent or $10 — whichever is higher. There are also limits to how much you can get. Usually, the limit is lower than a credit limit, so if you're in considerable debt, a cash advance likely won't cover it.
Debt Consolidation
Do you have several lines of credit that you're struggling to keep current every month? If so, consider credit card debt consolidation. For example, taking out a personal loan can help you manage your debts and reduce your monthly payments to one credit bill — that is, your loan repayment. This is a great option, as long as you make your payments on time and can snag a loan with reasonable rates and terms.